AU9034898A - Foamed core composite plate for use in trailer walls and doors - Google Patents
Foamed core composite plate for use in trailer walls and doors Download PDFInfo
- Publication number
- AU9034898A AU9034898A AU90348/98A AU9034898A AU9034898A AU 9034898 A AU9034898 A AU 9034898A AU 90348/98 A AU90348/98 A AU 90348/98A AU 9034898 A AU9034898 A AU 9034898A AU 9034898 A AU9034898 A AU 9034898A
- Authority
- AU
- Australia
- Prior art keywords
- core member
- foamed
- trailer
- thermal plastic
- skins
- 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.)
- Abandoned
Links
- 239000002131 composite material Substances 0.000 title description 49
- 229920003023 plastic Polymers 0.000 claims description 55
- 239000004033 plastic Substances 0.000 claims description 55
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 20
- 239000008188 pellet Substances 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- -1 polypropylene Polymers 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000004743 Polypropylene Substances 0.000 claims description 9
- 229920001155 polypropylene Polymers 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 229920000426 Microplastic Polymers 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 5
- 229920001903 high density polyethylene Polymers 0.000 claims description 4
- 239000004700 high-density polyethylene Substances 0.000 claims description 4
- 229920001684 low density polyethylene Polymers 0.000 claims description 3
- 239000004702 low-density polyethylene Substances 0.000 claims description 3
- 239000011874 heated mixture Substances 0.000 claims 1
- 239000011162 core material Substances 0.000 description 96
- 239000007787 solid Substances 0.000 description 23
- 238000005187 foaming Methods 0.000 description 15
- 238000010276 construction Methods 0.000 description 11
- 239000010410 layer Substances 0.000 description 10
- 239000012790 adhesive layer Substances 0.000 description 6
- 239000011324 bead Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000000088 plastic resin Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002313 adhesive film Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
- E04C2/292—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and sheet metal
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
- B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
- B29C44/321—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed part being a lining, e.g. a film or a support lining
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
- B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
- B29C44/326—Joining the preformed parts, e.g. to make flat or profiled sandwich laminates
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
- Securing Of Glass Panes Or The Like (AREA)
Description
FOAMED CORE COMPOSITE PLATE FOR USE IN TRAILER WALLS AND DOORS BACKGROUND OF THE INVENTION 5 This invention is generally directed to a novel composite plate for a trailer wall construction or a trailer door construction. More particularly, the invention contemplates a novel composite plate that has a foamed thermal plastic core which provides a variety of advantages over prior art solid core composite plates. Composite plates having solid plastic cores for use in forming trailer walls or 10 doors are known in the art. Such composite plates are formed from a pair of metal skins, formed of aluminum or steel, having a solid plastic core member, formed of polyethylene or polypropylene, sandwiched therebetween. The use of a solid plastic core member in a composite plate has worked reliably in the prior art, however, several disadvantages have been found. 15 Solid core composite plates tend to have low peel strength. That is, the metal skins peel away from the plastic core with small force. Furthermore, with the prior art solid core member, a high shear stress is obtained as the plastic core material changes temperature and if the shear stress gets too high, then the metal skins can delaminate from the solid plastic core member. 20 The present invention provides a novel composite plate having a foamed thermal plastic core member that is used in a trailer wall construction or a trailer door construction which overcomes the disadvantages of using a prior art solid plastic core member in a composite plate. Other features and advantages will become apparent upon a reading of the objects and description taken in combination with a study of the 25 drawings. 1 OBJECTS AND SUMMARY OF THE INVENTION A general object of the present invention is to provide a novel composite plate having a foamed thermal plastic core member which forms a wall or a door of a vehicle, such as a trailer. 5 An object of the present invention is to provide a novel composite plate for a trailer wall or door construction having a foamed thermal plastic core member which reduces the weight of the plate versus prior art solid core composite plates. Another object of the present invention is to provide a novel composite plate for a trailer wall or door construction having a foamed thermal plastic core member 10 which increases the peel strength of the plate versus prior art solid core composite plates. A further object of the present invention is to provide a composite plate for a trailer wall or door construction which reduces the shear stress of the skin to core bond layer so as to reduce the potential of delamination of the metal skins from the 15 thermal plastic core member under changing temperatures. Briefly, and in accordance with the foregoing, the present invention discloses a novel composite plate which is used to form a wall or a door of a vehicle, such as a trailer or van. Each composite plate used in the trailer is formed from a pair of metal skins, such as aluminum or steel, having a foamed thermal plastic core member 20 sandwiched therebetween. The skins are bonded to the core member by a known flexible adhesive layer. The foamed thermal plastic core member is resilient and may be made from foamed high density thermal plastic, such as polyethylene or polypropylene, or foamed low density thermal plastic, such as polyethylene or polypropylene, or other foamed thermal plastic. 25 To make the foamed core member used in the present invention, foaming beads or pellets are first mixed with thermal plastic resin beads or pellets by means of an auger in a mixing chamber. The foaming pellets have a gas therein. The mixed pellets are subjected to heat in a hot die chamber and the foaming pellets burst and produce carbon dioxide or nitrogen to foam the mixture. The mixture is extruded into 2 a layer by an extruder to form the foamed core member. Thereafter, a layer of flexible adhesive is preferably applied to the inner surface of the skins by suitable means, the layer of flexible adhesive can be applied to the opposite sides of the foamed thermal plastic core member by like suitable means, an adhesive film can be co-extruded on 5 both sides of the core member and laminated to the core member immediately, or the surfaces of the core member can be treated to become the adhesive bonding layer such that the skins can be directly bonded thereto. Thereafter, the metal skins are adhered to the core member by means of the flexible adhesive layer under pressure. This process may be continuous. It is envisioned that other means of foaming the core 10 member may be provided such as by injecting nitrogen into a heating chamber in which the thermal plastic resin pellets are being heated and are in a molten state and thereafter extruding the foamed core material into a core member, or by using both the nitrogen producing beads or pellets and the direct injection of nitrogen gas into a heating chamber in which the thermal plastic resin pellets and the nitrogen producing 15 pellets are being heated. BRIEF DESCRIPTION OF THE DRAWINGS The organization and manner of the structure and operation of the invention, together with further objects and advantages thereof, may best be understood by reference to the following description, taken in connection with the accompanying 2 0 drawings, wherein like reference numerals identify like elements in which: FIGURE 1 is a perspective view of a trailer having a plurality of composite plates which incorporate the features of the invention and which form the walls and the rear doors thereof; FIGURE 2 is a cross-sectional view of one of the plates of FIGURE 1; and 25 FIGURE 3 is a schematic view of an apparatus for forming one of the plates of FIGURES 1 and 2. 3 "r_ I I L711 /IUo't DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT While the invention may be susceptible to embodiment in different forms, there is shown in the drawings, and herein will be described in detail, a specific embodiment with the understanding that the present disclosure is to be considered an 5 exemplification of the principles of the invention, and is not intended to limit the invention to that as illustrated and described herein. The present invention discloses a novel composite plate 20 for use in a wall or door construction of a vehicle, such as a trailer 22, as shown in FIGURE 1, van or the like. The trailer 22 is generally comprised of a floor 24, a roof 26, a front wall 28, a 10 pair of opposite side walls 30 (only one of which is shown), rear cargo doors 32, a landing gear 34, and an undercarriage assembly 36. As shown in FIGURE 1, the trailer 22 is connected to a tractor 38 by conventional means, such as a fifth wheel. Each side wall 30 and the front wall 28 of the trailer 22 is formed from a plurality of the novel composite plates 20 of the present invention which are fastened 15 together by suitable means such as by riveting. Preferably, each composite plate 20 is rectangular having a height greater than its width. The composite plates 20 can be relatively equal in size or the width and thickness of each plate 20 may vary. When composite plates 20 are used in the construction of the side walls 30 and the front wall 28, each composite plate 20 is connected to the floor 24 and extends upwardly 20 therefrom and is attached to upper and lower rails of the trailer 20 by suitable joining members, such as bolts or rivets. When composite plates 20 are used in the construction of the rear doors 32, outer composite plates 20 are connected to the respective side walls 30 of the trailer 22 by hinges. When closed the doors 32 extend upwardly from the floor 24. Alternatively, each side wall 30 and the front wall 28 of 25 the trailer 22 may be formed from one such continuous plate 20. Attention is directed to FIGURE 2 which shows a cross-section of one of the novel composite plates 20 used in the construction of the trailer walls 28, 30 and/or doors 32. The composite plate 20 includes a pair of metal sheets or skins 40, 42 which are bonded to a foamed thermal plastic core member 44, described more fully 4 herein, which is sandwiched therebetween by a thin adhesive layer 46 (such thickness of the adhesive layer has been exaggerated in the drawings for clarity in understanding the invention). The skins 40, 42 are bonded to the foamed thermal plastic core member 44 by means of a known flexible adhesive bonding film 46. Skin 40 forms 5 an inner surface of the trailer 22 and skin 42 forms an outer surface of the trailer 22. The metal skins 40, 42 used in the composite plate 20 of the present invention are preferably formed of aluminum or full hard, high strength, high tension, galvanized steel. Preferably, the each of the skins 40, 42 are formed from galvanized steel and preferably, the inner skin 40 is over nineteen thousandths of an inch in 10 thickness and the outer skin 42 is over nineteen thousandths of an inch in thickness. The core member 44 is formed from a foamed thermal plastic, preferably foamed high density polyethylene (HDPE) or high density polypropylene, which makes the core member 44 resilient. That is, the core member 44 can flex without breaking. As shown in FIGURE 2, the core member 44 includes a plurality of air 15 bubbles 48 interspersed with the thermal plastic material 50. It has been found that molecular integrity of the core member 44 is not lost by the foaming of the core member 44 and peel strength is increased versus prior art composite plates which use a solid core member. That is, it takes a greater force to peel the metal skins 40, 42 from the foamed thermal plastic core member 44 than in prior art solid core composite 20 plates. This is described more fully herein. The foaming of the core member 44 lowers the density of the thermal plastic and improves the strength to weight ratio thereof. Alternatively, the core member 44 may be made from foamed low density thermal plastic, such as foamed low density polyethylene or low density polypropylene. Low density thermal plastic will foam and produce a resilient core 25 member, however, the resulting composite plate is not as stiff as when foamed high density thermal plastic is used in the composite plate. When foamed high density thermal plastic is used as the core member in the composite plate, the composite plate is approximately twice as stiff as when a foamed low density thermal plastic is used as the core member in the composite plate. 5 wr a~e dF%-uI/ L.1U070/11 IUZ'* The core member 44 preferably has a thickness of one half of an inch or less. The core member 44 used in the present invention is thinner than prior art solid cores which are mush thicker, typically three quarters of an inch to four inches. The foaming of the core member 44 reduces the weight of the composite plate 5 22 versus prior art solid core composite plates. Because the core member 44 is foamed in the present invention and is not solid as in prior art composite plates, the amount of plastic resin used in formation of the core member 44 is reduced by up to 50% versus prior art solid core composite plates. As mentioned herein, the foaming of the thermal plastic core member 44 also 10 increases the peel strength of the resulting composite plate 20. When the composite plate 22 is subjected to peel forces, that is, the skins 40, 42 are grasped opposite of each other and the skins 40, 42 are peeled away from the core member 44, the entire core member 44 flexes because the foamed core material is resilient and the peel force is along the length of the core member 44. Because the core member 44 is resilient 15 and flexes, this allows for more of the core member 44 to be loaded during application of peel forces. In the prior art, solid core members are provided in composite plates and therefore, the peel strength is low; especially compared to the present invention because the solid core composite plate are not as resilient. When a solid core member is used in a composite plate as is used in the prior art, to peel a skin from the core 20 member, peel force only is applied at a narrow line of the skin to crack the skin away from the solid core member. In the present invention, peel strength was measured by means of a peel test. The metal skins 40, 42 were grasped opposite of each other and the force required to peel the skins 40, 42 from the core member 44 was measured. It was found that an 25 increase in peel strength is obtained with the resilient foamed core member 44 of the present invention versus a solid core member as used in the prior art. This means that in the present invention, the skins 40, 42 are less likely to delaminate from the resilient core member 44 upon impact or because of abuse. In prior art solid core composite plates, a high shear stress is obtained between 6 the metal skins and the solid plastic core member as the composite plate temperature changes. If shear stress gets too high, then the metal skins can delaminate from the core member. The plastic core member expands or contracts fastener than the metal skins, however, the metal skins will restrict this expansion when they are bonded to 5 the core member, but high shear stresses result at the adhesive face. In the present invention, because the core material 44 is foamed, lower shear stresses of the skin to core bond layer result as temperature is changed because the foamed core member can be compressed or expanded because of the cell structure so as to reduce the potential of delamination of the metal skins 40, 42 from the thermal plastic core member 44. 10 Thus, the foamed thermal plastic core member 44 will still expand or contract faster than the metal skins 40, 42, however, the foamed thermal plastic core member 44 compresses or expands thereby neutralizing this faster expansion or contraction such that the foamed thermal plastic core member 44 expands or contracts at approximately the same rate as the metal skins 40, 42 and lower shear stresses result at the adhesive 15 face. To make the foamed core member 44 used in the present invention, as shown in FIGURE 3, foaming beads or pellets 52 are first mixed with thermal plastic resin beads or pellets 54 by means of an auger 56 in a mixing chamber 58. The foaming pellets 52 have a gas therein. The mixed pellets 54, 56 are subjected to heat in a hot 20 die chamber 60 and the foaming pellets 56 burst and produce carbon dioxide or nitrogen to foam the mixture. The mixture is extruded into a layer by an extruder 62 to form the foamed core member 44. Thereafter, a layer of flexible adhesive 46 is preferably applied to the inner surface of the skins 40, 42 by suitable means 64, as shown, the layer of flexible adhesive 46 can be applied to the opposite sides of the 25 foamed thermal plastic core member 44 by like suitable means, an adhesive layer of film 46 can be co-extruded on both sides of the core member 44 and laminated to the core member 44 immediately, or the outer surfaces of the core member 44 can be treated to become the adhesive bonding layer 46 such that the skins 40, 42 can be directly bonded thereto. Thereafter, the metal skins 40, 42 are adhered to the core 7 member 44 by means of the flexible adhesive layer 46 under pressure. It is to be noted that the more gas that is used during the heating step, the more reduction in core material is ultimately achieved. This process may be continuous. It is envisioned that other means of foaming the core member 44 may be 5 provided such as by injecting nitrogen into a heating chamber in which the thermal plastic resin pellets 54 are being heated and are in a molten state (without the foaming pellets 52 being mixed therewith) and thereafter extruding the foamed core material into a core member 44, or by using both the foaming pellets 52 and the direct injection of nitrogen gas into a heating chamber (shown via conduit 61 shown in phantom lines 10 in FIG. 3) in which both the thermal plastic resin pellets 54 and the foaming pellets 52 are being heated. While a preferred embodiment of the present invention is shown and described, it is envisioned that those skilled in the art may devise various modifications of the present invention without departing from the spirit and scope of 15 the appended claims. 8
Claims (24)
1. A trailer (22) comprising: a floor (24) and at least one upstanding member (28, 30, 32) extending upwardly from said floor (24), said upstanding member (28, 30, 32) including a pair of skins (40, 42) having a foamed thermal plastic core member (44) 5 sandwiched therebetween.
2. A trailer (22) as defined in claim 1, wherein said foamed thermal plastic core member (44) is resilient.
3. A trailer (22) as defined in claim 1, wherein said foamed thermal plastic core member (44) is made from foamed high density thermal plastic. 10
4. A trailer (22) as defined in claim 3, wherein said foamed high density thermal plastic is foamed high density polyethylene or high density polypropylene.
5. A trailer (22) as defined in claim 1, wherein said foamed plastic core member (44) is made from foamed low thermal plastic.
6. A trailer (22) as defined in claim 5, wherein said foamed low density thermal 15 plastic is foamed low density polyethylene or low density polypropylene.
7. A trailer (22) as defined in claim 1, wherein said upstanding member (28, 30, 32) is a side wall (30), a front wall (28) or a door (32) of said trailer (22).
8. A trailer (22) as defined in claim 1, wherein said skins (40, 42) are formed from metal. 20
9. A trailer (22) as defined in claim 1, wherein said skins (40, 42) are bonded to 9 said core member (44) by a flexible adhesive (46).
10. A trailer (22) as defined in claim 1, wherein said thermal plastic core member (44) has a thickness of one half of an inch or less.
11. A method of forming a wall (28, 30) or a door (32) of a trailer (22) comprising 5 the steps of: mixing thermal plastic resin pellets (54) and gas pellets (52) together; applying heat to said mixed pellets (52, 54); extruding said heated mixture into a core member (44); and bonding skins (40, 42) to opposite sides of said core member (44).
12. A method as defined in claim 12, further including the step of applying a flexible adhesive (46) to inner surfaces of said skins (40, 42) or to opposite sides of 10 said core member (44) prior to bonding said skins (40, 42) to said opposite sides of said core member (44).
13. A method of forming a wall (28, 30) or a door (32) of a trailer (22) comprising the steps of: applying heat to thermal plastic resin pellets (54) in a heating chamber (60); injecting nitrogen into said heating chamber (60), thereby forming a foamed 15 mixture; extruding said foamed mixture from said heating chamber (60) into a core member (44); and bonding skins (40, 42) to opposite sides of said core member (44).
14. A method as defined in claim 13, further including the step of applying a flexible adhesive (46) to inner surfaces of said skins (40, 42) or to opposite sides of said core member (44) prior to bonding said skins (40, 42) to said opposite sides of 20 said core member (44).
15. A method of forming a wall (28, 30) or a door (32) of a trailer (22) comprising the steps of: mixing thermal plastic resin pellets (54) and gas pellets (52) together; applying heat to said mixed pellets (52, 54) in a heating chamber (60); injecting 10 nitrogen into said heating chamber (60), thereby forming a foamed mixture; extruding said foamed mixture from said heating chamber (60) into a core member (44); and bonding skins (40, 42) to opposite sides of said core member (44).
16. A method as defined in claim 19, further including the step of applying a 5 flexible adhesive (46) to inner surfaces of said skins (40, 42) or to opposite sides of said core member (44) prior to bonding said skins (40, 42) to said opposite sides of said core member (44).
17. A plate (20) capable of use in forming a wall (28, 30) or a door (32) of a trailer (22) comprising: a member (20) including a pair of skins (40, 42) having a foamed 10 thermal plastic core member (44) sandwiched therebetween.
18. A plate (20) as defined in claim 17, wherein said foamed thermal plastic core member (44) is made from foamed high density thermal plastic.
19. A plate(20) as defined in claim 18, wherein said foamed high density thermal plastic is foamed high density polyethylene or high density polypropylene. 15
20. A plate (20) as defined in claim 19, wherein said foamed thermal plastic core member (44) is made from foamed low density thermal plastic.
21. A plate (20) as defined in claim 20, wherein said foamed low density thermal plastic is foamed low density polyethylene or low density polypropylene.
22. A plate (20) as defined in claim 17, wherein said skins (40, 42) are formed 20 from metal.
23. A plate (20) as defined in claim 17, wherein said skins (40, 42) are bonded to 11 vvu I / lvi L3O/ / U,1 said core member (44) by a flexible adhesive.
24. A plate (20) as defined in claim 17, wherein said thermal plastic core member (44) has a thickness of one half of an inch or less. 12
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US5772297P | 1997-08-28 | 1997-08-28 | |
| US60057722 | 1997-08-28 | ||
| US94217397A | 1997-10-01 | 1997-10-01 | |
| US08942173 | 1997-10-01 | ||
| PCT/US1998/017654 WO1999010220A1 (en) | 1997-08-28 | 1998-08-26 | Foamed core composite plate for use in trailer walls and doors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU9034898A true AU9034898A (en) | 1999-03-16 |
Family
ID=26736823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU90348/98A Abandoned AU9034898A (en) | 1997-08-28 | 1998-08-26 | Foamed core composite plate for use in trailer walls and doors |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP1007400A1 (en) |
| JP (1) | JP2001514115A (en) |
| CN (1) | CN1268090A (en) |
| AU (1) | AU9034898A (en) |
| BG (1) | BG104190A (en) |
| BR (1) | BR9812011A (en) |
| CA (1) | CA2301651A1 (en) |
| HU (1) | HUP0003192A3 (en) |
| WO (1) | WO1999010220A1 (en) |
| YU (1) | YU11000A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7587984B2 (en) | 2004-03-05 | 2009-09-15 | Martin Marietta Materials, Inc. | Insulated cargo containers |
| US7434520B2 (en) | 2004-04-12 | 2008-10-14 | Martin Marietta Materials, Inc. | Insulated cargo container doors |
| CN1292894C (en) * | 2004-09-23 | 2007-01-03 | 沈志伟 | Multi-purpose composite boards |
| DE102007046226A1 (en) * | 2007-09-26 | 2009-04-09 | Thyssenkrupp Steel Ag | Method for producing a lightweight sheet |
| JP5247672B2 (en) * | 2009-12-25 | 2013-07-24 | 日本フルハーフ株式会社 | Panel material for box-type cargo bed for vehicles |
| US9988097B2 (en) | 2013-12-11 | 2018-06-05 | Sabalito Llc | Flooring for vehicle decks and manufactured housing |
| CN103770399A (en) * | 2014-01-27 | 2014-05-07 | 苏州乾雄金属材料有限公司 | Thermal insulation metal material |
| GB2528668A (en) | 2014-07-25 | 2016-02-03 | Daniel Muir | Method of Manufacturing A Structural Panel For An Engineering Structure |
| KR101666491B1 (en) * | 2015-01-30 | 2016-10-24 | 한국차체 주식회사 | Composite material cargo box for truck |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3697633A (en) * | 1970-07-21 | 1972-10-10 | Howard M Edgar | Structural core |
| US3746388A (en) * | 1971-06-30 | 1973-07-17 | Fieldhome Equip Corp | Cargo carrying vehicle construction |
| US4958472A (en) * | 1989-05-30 | 1990-09-25 | Wabash National Corporation | Composite trailer sidewall |
| CA2102227C (en) * | 1991-04-23 | 1996-04-16 | Alan J. Demello | Process for extruding low density foam using water blowing agent |
-
1998
- 1998-08-26 CA CA002301651A patent/CA2301651A1/en not_active Abandoned
- 1998-08-26 AU AU90348/98A patent/AU9034898A/en not_active Abandoned
- 1998-08-26 BR BR9812011-5A patent/BR9812011A/en not_active Application Discontinuation
- 1998-08-26 HU HU0003192A patent/HUP0003192A3/en unknown
- 1998-08-26 CN CN98808480A patent/CN1268090A/en active Pending
- 1998-08-26 WO PCT/US1998/017654 patent/WO1999010220A1/en not_active Ceased
- 1998-08-26 JP JP2000507568A patent/JP2001514115A/en active Pending
- 1998-08-26 EP EP98942247A patent/EP1007400A1/en not_active Withdrawn
-
2000
- 2000-02-25 BG BG104190A patent/BG104190A/en unknown
- 2000-02-28 YU YU11000A patent/YU11000A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| HUP0003192A3 (en) | 2002-01-28 |
| CA2301651A1 (en) | 1999-03-04 |
| BG104190A (en) | 2000-08-31 |
| CN1268090A (en) | 2000-09-27 |
| JP2001514115A (en) | 2001-09-11 |
| BR9812011A (en) | 2000-09-26 |
| HUP0003192A2 (en) | 2001-02-28 |
| WO1999010220A1 (en) | 1999-03-04 |
| EP1007400A1 (en) | 2000-06-14 |
| YU11000A (en) | 2001-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20010011832A1 (en) | Foamed core composite plate for use in trailer walls and doors | |
| EP0527109B1 (en) | Process for the manufacture of a composite panel with a cellular core and at least one outer layer | |
| US5938274A (en) | Coining offset into edge of composite plate members for forming trailer doors and walls | |
| EP1089870B1 (en) | Reinforcement laminate | |
| US20070256379A1 (en) | Composite panels | |
| JPH0686062B2 (en) | Method of manufacturing a liner for a refrigerator cabinet and an insulating wall structure for a refrigerator cabinet | |
| AU9034898A (en) | Foamed core composite plate for use in trailer walls and doors | |
| WO1997025198A9 (en) | Composite honeycomb sandwich structure | |
| EP0883484A1 (en) | Composite honeycomb sandwich structure | |
| US5685940A (en) | Adhering tiedown plies in composite construction | |
| US8524351B2 (en) | Composite panel | |
| JPS6092831A (en) | Method of co-curing skin member made of composite material and directly joining it to honeycomb core | |
| US20250188741A1 (en) | Thermoplastic roofing membrane composites with protective film and methods for installing the same | |
| CA1064781A (en) | Method of heat lamination and laminate product | |
| MXPA00001808A (en) | Foamed core composite plate for use in trailer walls and doors | |
| US20030003827A1 (en) | Structural component and a method for producing same | |
| JPH10157531A (en) | Panel reinforcing laminated sheet | |
| JP3162494B2 (en) | Fiber reinforced molded plate | |
| KR200308894Y1 (en) | Sandwich Panels for Special Vehicles | |
| KR960010139B1 (en) | Manufacturing method of aluminium sandwich panel | |
| JPH08127093A (en) | Laminated synthetic panel having intermediate synthetic resin sheet | |
| US20250019007A1 (en) | Hardpoint connectors for composite truck body floors | |
| JP3209830B2 (en) | Manufacturing method of composite pipe | |
| AT403286B (en) | Process for producing fibre-reinforced, heat-expanded thermoplastic films and component | |
| CA2242050A1 (en) | Composite honeycomb sandwich structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PC1 | Assignment before grant (sect. 113) |
Owner name: WABASH TECHNOLOGY CORPORATION Free format text: THE FORMER OWNER WAS: WABASH NATIONAL CORPORATION |
|
| MK5 | Application lapsed section 142(2)(e) - patent request and compl. specification not accepted |