NL2006525C2 - A seat cushion, for instance for an aircraft seat, and method for manufacturing such a seat cushion. - Google Patents

A seat cushion, for instance for an aircraft seat, and method for manufacturing such a seat cushion. Download PDF

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Publication number
NL2006525C2
NL2006525C2 NL2006525A NL2006525A NL2006525C2 NL 2006525 C2 NL2006525 C2 NL 2006525C2 NL 2006525 A NL2006525 A NL 2006525A NL 2006525 A NL2006525 A NL 2006525A NL 2006525 C2 NL2006525 C2 NL 2006525C2
Authority
NL
Netherlands
Prior art keywords
seat
seat cushion
cushion
reinforcement
chair
Prior art date
Application number
NL2006525A
Other languages
Dutch (nl)
Inventor
Robert Lievestro
Johannes Blitterswijk
Original Assignee
Recticel Holding Noord B V
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 Recticel Holding Noord B V filed Critical Recticel Holding Noord B V
Priority to NL2006525A priority Critical patent/NL2006525C2/en
Priority to EP12162502A priority patent/EP2505104A1/en
Priority to US13/436,729 priority patent/US9033420B2/en
Application granted granted Critical
Publication of NL2006525C2 publication Critical patent/NL2006525C2/en

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
    • A47C27/15—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays consisting of two or more layers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
    • A47C27/16—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays reinforced with sheet-like or rigid elements, e.g. profiled
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/001—Fireproof means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/70—Upholstery springs ; Upholstery
    • B60N2/7017—Upholstery springs ; Upholstery characterised by the manufacturing process; manufacturing upholstery or upholstery springs not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D11/00—Passenger or crew accommodation; Flight-deck installations not otherwise provided for
    • B64D11/06—Arrangements of seats, or adaptations or details specially adapted for aircraft seats
    • B64D11/0647—Seats characterised by special upholstery or cushioning features
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/771—Seats

Description

P93424NL00
Title: A seat cushion, for instance for an aircraft seat, and a method for manufacturing such a seat cushion
The invention relates to a seat cushion, in particular for an aircraft seat, the seat cushion comprising a seat part having a receiving surface adapted to receive a user and a reinforcing part supporting the seat part.
Such seat cushions are known from practice and are for instance 5 provided in a vehicle seat such as a seat for an aircraft. Since a seat provided with such a seat cushion may be occupied by a person for an amount of hours in a row, it is desired that the seat is comfortable. Therefore, such seat cushions may be provided with a resilient body, for instance of polyurethane and can comprise a covering of a fabric. At the same time, the seat cushion has 10 to have a certain strength to be durable, and if necessary, to persist certain impacts. The cushion may therefore comprise a reinforcing structure such as a reinforcing core or a support frame or the like. A drawback of such seat cushions is that these are relatively heavy, which is undesired especially when used in an airplane.
15
Therefore, the present invention aims to provide an improved seat cushion for a vehicle seat, in particular for an aircraft. More in particular, the invention contemplates a seat cushion with improved characteristics, especially with a reduced weight while at least maintaining or improving other 20 properties such as comfort and impact resistance.
To that end a seat cushion according to the invention is characterized in that the at least the reinforcing part contains expanded polypropylene (EPP) comprising fire retardant properties.
25 Because integrating fire retardant properties into polypropylene raw material has become possible recently, expanded polypropylene manufactured 2 from said raw material may be used to advantage in a seat cushion, especially when used in an aircraft. Since the expanded polypropylene used comprises improved fire retardant properties, it may be used for products and in locations where strict regulations concerning flammability apply.
5 Furthermore, expanded polypropylene has a relatively low density and provides for a relatively light weight reinforcing part and thus for a relatively light weight seat cushion, especially when compared to the known aircraft seat cushion as described before. When only the seat part will be manufactured from a material such as polyurethane and the reinforcing part will be 10 manufactured from expanded polypropylene instead of from polyurethane, the weight will reduce due to the lower density of expanded polypropylene with respect to the density of polyurethane. At the same time, the seat cushion will have increased impact absorption characteristics, because of the increased impact absorption properties of the reinforcing part of expanded 15 polypropylene. Besides, due to said improved impact absorption characteristics, the cushion gives a reduced spine load in acceleration tests such as 14G and 16G tests. Since the expanded polypropylene comprises increased fire retardant properties, this can be used to advantage in a seat cushion for an aircraft as mentioned before. After all, seat cushions that are 20 used in an aircraft do have to comply with strict regulations, for instance concerning flammability. In case of a fire inside the aircraft, the seat cushions have to have a high fire resistance in order to prevent the fire from spreading in a quick manner inside the aircraft. In different words, when an aircraft seat is subjected to intense heat or to direct contact with fire, the seat and thus also 25 the seat cushion may not catch fire immediately. When the seat cushion catches fire and the fire is removed, the seat cushion has to self-extinguish the fire or at least be fire retardant.
A further advantage of a seat cushion comprising a reinforcing part containing expanded polypropylene is that it can be recycled. By providing the 3 reinforcing part as a separate part, at least the reinforcing part may be recycled completely.
It is noted that the seat cushion may be used as a sitting cushion, as a back cushion, in a headrest, in foot stools and the like.
5 In further elaboration of the invention, the reinforcing part may be a discrete element, comprising said expanded polypropylene or consisting of said expanded polypropylene. For instance, by moulding the reinforcing part out of expanded polypropylene, difficult shapes of the reinforcing part and thus of the receiving surface seat cushion may be easily obtained. This enables 10 manufacturing of seat cushions with improved ergonomic qualities, thus an enhanced seating comfort. Due to the improved ergonomic properties of the expanded polypropylene the thickness of the seat part may be limited. Consequently, the total weight of the seat cushion may be reduced. Preferably, the seat part covers an upper surface of the reinforcing part, at least partly, to 15 provide the seat with a comfortable upper layer to enhance comfort during flying. For instance, the seat part may comprise a resilient layer comprising resilient material such as polyurethane (PU) foam, for instance high resilient PU foam or, graphite foam. Also other kinds of resilient materials such as textile or the like material may be used. Alternatively or additionally, the seat 20 part may comprise a resilient layer formed by an air pillow or the like. The resilient layer may be provided on top of the reinforcing part but may also surround the side surfaces of the reinforcing part, for instance at least partly.
The seat part and the reinforcing part may be interconnected, for instance by means of an adhesive layer. Connecting the seat part to the 25 reinforcing part by means of an adhesive provides for a solid seat cushion without risking the upper part coming off from the lower part of the seat cushion. Instead, the seat part and the reinforcing part may be removably interconnected, for instance by means of a Velcro connection or the seat part may only be positioned on top of the reinforcing part without any additional 30 fastening means.
4
Furthermore, due to the relatively low density of the seat cushion, said cushion may be used as a floating device in case of an emergency, for instance when the aircraft lands on water.
In an alternative embodiment of the invention, the seat part and the 5 reinforcing part may be integrally formed in a discrete element out of a base material that at least encloses expanded polypropylene particles comprising the fire retardant properties. Such a seat cushion may be manufactured with a limited amount of manufacturing process steps, thereby providing relatively fast manufacturing. Furthermore, this seat cushion containing expanded 10 polypropylene particles has a relatively limited density such that also this embodiment of the seat cushion provides a desired floating capacity. Preferably, the base material may be a polyurethane foam or the like.
In order to further reduce the weight of the seat cushion, it may be very advantageous if the reinforcing part comprises at least one cavity, 15 preferably extending from a surface of the reinforcing part that faces away from the seat part in a direction towards the seat part. For instance, the reinforcing part may comprise an array of cavities such that the weight of the reinforcing part is further reduced.
20 The invention further relates to a method for manufacturing an above mentioned and described seat cushion according to the features of claim 10. Such a method provides for easy and simple manufacture of a seat cushion according to the invention. Furthermore, manufacturing costs may be relatively low, since manufacturing of the cushion according to the method of 25 the invention demands less manufacturing process steps and less parts to be assembled.
The invention also relates to a seat, more in particular an aircraft seat with an above described seat cushion and to a vehicle, vessel and/or 5 aircraft provided with such a seat. Such a seat and such a vehicle, vessel and/or aircraft provide similar advantages as mentioned with the seat cushion.
Further advantageous embodiments of a seat cushion according to 5 the invention are set forth in the dependent claims. To explain the invention, exemplary embodiments thereof will hereinafter be described with reference to the accompanying drawings, wherein: FIG. 1 schematically shows perspective view of first embodiment of a 10 seat cushion according to the invention; FIG. 2 schematically shows a further perspective view of the seat cushion of Figure 1; FIG. 3 schematically shows a cross sectional front view of the first embodiment of a seat cushion according to the invention; 15 FIG. 4 schematically shows a perspective view of a second embodiment of the seat cushion according to the invention; and FIG. 5 schematically shows a cross sectional side view of the second embodiment of the seat cushion as shown in Figure 4.
20 It is noted that identical or corresponding elements in the different drawings are indicated with identical or corresponding reference numerals.
In Figures 1-3, a first embodiment of the seat cushion 1 according to the invention is shown. The shown embodiment comprises a seat cushion 1 25 configured as a seating support. However, in an alternative embodiment (not shown), the seat cushion 1 may also be configured as a back cushion providing back support. The seat cushion 1 of Figure 1 comprises a seat part 2 and a reinforcing part 3 supporting the seat part 2. The seat part 2 is adapted to receive a person. Therefore, the upper surface 2a, i.e. the surface 2a facing 30 away from the reinforcing part 3, may have a curved shape that is adapted to 6 the curves of a user to provide a comfortable seat. The reinforcing part 3 is providing the seat cushion 1 with a desired stability and impact absorbing capacity. According to the first embodiment of the seat cushion 1, the reinforcing part 3 comprises a moulded element manufactured from expanded 5 polypropylene (EPP) having fire retardant properties. The seat part 2 may comprise a resilient material such as a foamed polymer, such as polyurethane (PU) foam, such as high resilient PU foam, graphite foam, bonded foam, polyether foam or the like material.
The reinforcing part 3 of the seat cushion 1 may be manufactured by 10 a moulding process to form the reinforcing part 3 as a separate moulded element out of EPP enabling a design of the cushion having difficult shapes. After moulding the reinforcing part 3, a layer 4 of the resilient material, in the shown embodiment a layer of polyurethane foam may be provided at least at the upper surface 3a of the reinforcing part 3. Since the reinforcing part 3 is a 15 moulded product, the contours of the seat cushion 1 that are adapted to the body curves of a user may be easily provided. Therefore, the polyurethane layer 4 does not have to comprise complex shapes to provide an ergonomic seat cushion 1 and may comprise a relatively thin layer 4. The polyurethane foam layer 4 may be attached to the upper surface 3a of the reinforcing part 3 by 20 means of an adhesive layer 5 (see also Figure 3). Also other suitable adhesive means may be used. The adhesive layer 5 may be provided between the surfaces 2b, 3a of the respective parts 2, 3. The adhesive layer 5 may extend along the entire surfaces 2b, 3a, but may for instance only be provided around the perimeters of the surfaces 2b, 3a. The resilient layer 4 provides for a soft 25 seating surface of the seat cushion 1 to enable comfortable sitting. The reinforcing part 3 provides stability to the seat cushion 1. Since the expanded polypropylene material of the reinforcing part 3 has a lower density than the polyurethane material of the seat part 2, the weight of the seat cushion 1 is relatively low compared to prior art seat cushions. To further limit the weight 30 of the seat cushion it may be advantageous to provide the reinforcing part 3 of 7 the seat cushion 1 with cavities 10, 12. Such cavities 10, 12 reduce the amount of material but do not weaken the strength and stability of the seat cushion 1. In the shown embodiment, the first cavities 10 are arranged in an array and extend from a lower surface 3b, i.e. the surface 3b of the reinforcing part 3 that 5 faces away from the seat part 2, in a direction towards the seat part 2 and end at a short distance from the upper surface of the reinforcing part 3. Furthermore, second cavities 12 are arranged in a line that extends substantially parallel to a side surface lc of the seat cushion 1 that in use faces the legs of a user. Of course, cavities may be provided on different locations of 10 the reinforcing part 3, for instance dependent on the design and/or dimensions of the reinforcing part 3. Also the dimensions of the cavities 10, 12 may vary based on the design and/or shape of the reinforcing part 3 or of the seat cushion 1.
Due to the relative low density of the material of the reinforcing part 15 3, the seat cushion 1 may be used as a floating device, for instance in case of an emergency landing. Furthermore, the reinforcing part 3 has such fire retardant properties that the seat cushion complies with safety regulations for aircrafts. This means that the seat cushion according to the invention has properties that provide the seat cushion with a high fire resistance to prevent 20 a possible fire from spreading quickly. The lower surface 3b of the reinforcing part 3 may be adapted to cooperate with a seat frame (not shown) of an aircraft seat. Specific connecting means to connect the seat cushion 1 to the seat frame may be provided. The connecting means may be designed in various manners and comprise for instance suitable screw connections, snap 25 connections, riveted connections, elastic connections, button connections, hook connections, Velcro and/or the like. In a different embodiment (not shown) it is also possible that the reinforcing part 3 is part of a seat frame and the seat part 2 forms the seat cushion 1.
8
Furthermore, the reinforcing part 3 may be manufactured with other methods than moulding, for instance by means of a slab-stock process and subsequently be cut to obtain the desired shape.
5 In Figures 4 and 5 a further embodiment of the seat cushion 101 according to the invention is shown. Elements that are similar to elements described with the first embodiment are not described again. Therefore, reference is made to the above description relating to the first embodiment.
The seat cushion 101 comprises a seat part 102 and a reinforcing 10 part 103, wherein both partsl02, 103 are integrally formed in one piece 105 out of a base material 106 that encloses expanded polypropylene particles 107 (see for instance Figure 5) having fire retardant properties. The particles 107 may be formed out of a polypropylene raw material having fire retardant properties. The particles 107 may have different dimensions, for instance 15 having a diameter of 3-4 mm. Actually, the particles 107 may have a dimension in the range of a few nano- or micrometer to a few millimetre, such as approximately 15 mm.
The particles 107 may be distributed regularly or irregularly through the base material 106. As is visible in Figure 5, the particles 107 are 20 distributed irregularly through the base material 106. The integrated seat part and reinforcing part 105 may be manufactured by means of a moulding process. Therefore, a material mixture comprising base material 106 and an amount of particles 107 is inserted in a mould cavity having a shape corresponding to the outer surfaces of the integrated part 105. During the 25 moulding process, the particles 107 may displace with respect to the base material 106 due to a difference in relative density before hardening of the material mixture inside the mould cavity. Applicant found that the way of distribution of the particles 107 in the base material 106 does not have a significant influence with regard to the properties of the moulded product 105.
9
For instance, the strength of the seat cushion 101 will be as desired regardless of the distribution pattern of the particles seen in cross sectional view.
The seat cushion 101 as shown in Figures 4 and 5 provides a high strength to weight ratio, a desired impact absorption and a comfortable seating 5 surface. The latter property may be influenced by the kind of base material 106 used. The base material 106 may for instance be a resilient polymer such as a polyurethane (PU) foam, such as a HR PU foam, a graphite foam, bonded foam or the like material. The strength of the cushion 101 may mostly be determined by the EPP particles provided inside the base material 106.
10 Furthermore, the seat cushion 101 has a relatively low density (for instance compared to the density of water) such that the seat cushion 101 has floating capacities. Consequently, also the second embodiment of the seat cushion according to the invention may be used as a floating device.
Since the seat part 102 and the reinforcing part 103 are integrally 15 formed in one piece, the manufacturing process thereof may be easy and economically attractive due to the small amount of separate components and the limited process steps needed.
In order to reduce weight of the seat cushion 101 it may comprise cavities 110, 112, similarly as described with the first embodiment of the seat 20 cushion 1 according to the invention. The first cavities 110 extend from a lower surface 103b of the integrated seat and reinforcing part 105 towards the upper receiving surface 102a of said part 105. The upper receiving surface 102a may comprise an ergonomically designed shape to provide a comfortable support for a user. Instead of moulding the seat cushion 101, this cushion may instead be 25 manufactured using a slab-stock process.
Although illustrative embodiments of the present invention have been described above, in part with reference to the accompanying drawings, it is to be understood that the invention is not limited to these embodiments.
30 Variations to the disclosed embodiments can be understood and effected by 10 those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims. It will be clear, for example, that the seat cushion may have different shapes and dimensions dependent on the use thereof. Furthermore, the seat cushion, for instance the 5 lower surface of the reinforcing part, may be adapted to cooperate with a seat frame onto which the seat cushion may be mounted. Besides, the seat cushion may comprise a different amount of cavities provided at different locations inside the reinforcing part of the seat cushion. The cavities may have different shapes and different dimensions.
10 In addition, the seat cushion may, for instance, be used in various types of seat apparatuses, for instance chairs, couches and/or armchairs, and for, for instance, seat apparatuses in aircraft, vessels and/or vehicles, in particular trains, automobiles and the like.
15 Reference throughout this specification to “one embodiment” or “an embodiment” means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment in the present invention. Thus, the appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this 20 specification are not necessarily all referring to the same embodiment.
Furthermore, it is noted that particular features, structures or characteristics of one or more embodiments may be combines in any suitable manner to form new, not explicitly described embodiments.

Claims (18)

1. Een stoelkussen, bijvoorbeeld voor een vliegtuigstoel, waarbij het stoelkussen (1, 101) een zittingdeel (2, 102) heeft met een opneemoppervlak ingericht om een gebruiker op te nemen en een verstevigingsdeel (3, 103) dat het zittingdeel ondersteunt, waarbij ten minste het verstevigingsdeel 5 geëxpandeerd polypropyleen (EPP) met brandvertragende eigenschappen omvat.A seat cushion, for example for an aircraft seat, wherein the seat cushion (1, 101) has a seat part (2, 102) with a receiving surface adapted to receive a user and a reinforcement part (3, 103) supporting the seat part, at least the reinforcement member 5 comprises expanded polypropylene (EPP) with fire retardant properties. 2. Stoelkussen volgens conclusie 1, waarbij het verstevigingsdeel een afzonderlijk element is dat het geëxpandeerde polypropyleen omvat. 10The seat cushion of claim 1, wherein the reinforcement member is a separate element that comprises the expanded polypropylene. 10 3. Stoelkussen volgens een van de voorgaande conclusies, waarbij het zittingdeel ten minste gedeeltelijk een bovenste oppervlak van het verstevigingsdeel bedekt, waarbij het bovenste oppervlak het opneemoppervlak van het stoelkussen definieert. 15Chair cushion according to one of the preceding claims, wherein the seat part at least partially covers an upper surface of the reinforcement part, the upper surface defining the receiving surface of the chair cushion. 15 4. Stoelkussen volgens een van de voorgaande conclusies, waarbij het zittingdeel een veerkrachtige laag omvat van veerkrachtig materiaal zoals een polyurethaanschuim (PU), bijvoorbeeld hoog flexibel (e. high resilient) PU schuim of grafietschuim, een textiel of een ander soortgelijk materiaal. 20A seat cushion according to any one of the preceding claims, wherein the seat part comprises a resilient layer of resilient material such as a polyurethane foam (PU), for example highly flexible (high resilient) PU foam or graphite foam, a textile or other similar material. 20 5. Stoelkussen volgens een van conclusies 1-3, waarbij het zittingdeel een veerkrachtige laag gevormd door een luchtkussen of dergelijke omvat.A seat cushion according to any of claims 1-3, wherein the seat part comprises a resilient layer formed by an air cushion or the like. 6. Stoelkussen volgens een van de voorgaande conclusies, waarbij het 25 zittingdeel en het verstevigingsdeel onderling zijn verbonden, bijvoorbeeld met behulp van een lijmlaag, of onderling losneembaar zijn verbonden, bijvoorbeeld met behulp van een klittenband verbinding.6. Chair cushion according to one of the preceding claims, wherein the seat part and the reinforcement part are mutually connected, for example with the aid of an adhesive layer, or mutually releasably connected, for example with the aid of a Velcro connection. 7. Stoelkussen volgens conclusie 1, waarbij het zittingdeel (102) en het 5 verstevigingsdeel (103) integraal gevormd zijn in een afzonderlijk element (105) uit een basismateriaal dat ten minste geëxpandeerde polypropyleen deeltjes die de brandwerende eigenschappen omvatten, insluit.7. Seat cushion according to claim 1, wherein the seat part (102) and the reinforcement part (103) are integrally formed in a separate element (105) of a base material that includes at least expanded polypropylene particles comprising the fire-resistant properties. 8. Stoelkussen volgens conclusie 7, waarbij het basismateriaal een 10 polyuretaanschuim is, zoals een hoog flexibel PU schuim, grafietschuim en dergelijke.8. Chair cushion according to claim 7, wherein the base material is a polyurethane foam, such as a highly flexible PU foam, graphite foam and the like. 9. Stoelkussen volgens een van de voorgaande conclusies, waarbij ten minste het verstevigingsdeel ten minste een holte (10, 110;12, 112) omvat, die 15 zich bij voorkeur van een oppervlak van het verstevigingsdeel dat afwijst van het zittingdeel uitstrekt in een richting naar het zittingdeel.9. Seat cushion according to any of the preceding claims, wherein at least the reinforcement part comprises at least one cavity (10, 110; 12, 112), which preferably extends in a direction from a surface of the reinforcement part that deviates from the seat part to the seat part. 10. Een werkwijze voor het vervaardigen van een stoelkussen, bijvoorbeeld voor een vliegtuigstoel, bij voorkeur volgens een van de voorgaande conclusies, 20 waarbij het kussen een zittingdeel omvat met een opneemoppervlak ingericht om een gebruiker op te nemen en een verstevigingsdeel dat het zittingdeel ondersteunt, waarbij de werkwijze omvat het vormen van ten minste het verstevigingsdeel van het stoelkussen door middel van een opschuimproces, zoals een (spuit)gietproces of een slab-stock proces, uit een grondstof ten 25 minste omvattende te expanderen polypropyleen omvattende brandwerende eigenschappen.10. A method of manufacturing a seat cushion, for example for an airplane seat, preferably according to any of the preceding claims, wherein the cushion comprises a seat part with a receiving surface adapted to receive a user and a reinforcement part supporting the seat part, wherein the method comprises forming at least the reinforcement part of the chair cushion by means of a foaming process, such as a (injection) casting process or a slab-stock process, from a raw material comprising at least fire-resistant properties comprising polypropylene comprising fire-resistant properties. 11. Werkwijze volgens conclusie 10, waarbij het verstevigingsdeel een apart onderdeel is dat geheel uit geëxpandeerd polypropyleen is gevormd in een 30 (spuit)gietproces.11. Method as claimed in claim 10, wherein the reinforcing part is a separate part which is entirely formed from expanded polypropylene in a (injection) casting process. 12. Werkwijze volgens conclusie 10, waarbij de grondstof een basismateriaal omvat en geëxpandeerde polypropyleendeeltjes, waarbij het basismateriaal en de deeltjes gelijktijdig worden verwerkt, bijvoorbeeld worden ingevoerd in een matrijsholte als een mengsel of toegevoerd op een bewegende transportband. 5The method of claim 10, wherein the raw material comprises a base material and expanded polypropylene particles, the base material and the particles being processed simultaneously, for example, being introduced into a mold cavity as a mixture or supplied on a moving conveyor belt. 5 13. Werkwijze volgens conclusie 12, waarbij het verstevigingsdeel en het zittingdeel integraal zijn gevormd als een afzonderlijk element in dezelfde werkwijze stap.The method of claim 12, wherein the reinforcement member and the seat member are integrally formed as a separate element in the same method step. 14. Werkwijze volgens een van conclusies 10-11, waarbij het zittingdeel een veerkrachtige laag omvat bijvoorbeeld van een veerkrachtig materiaal, zoals polyurethaanschuim, die is bevestigd aan een bovenste oppervlak van het verstevigingsdeel, bijvoorbeeld door beide delen aan elkaar te lijmen, of losneembaar is bevestigd aan een bovenste oppervlak van het 15 verstevigingsdeel, bijvoorbeeld met behulp van een klittenband verbinding.Method according to any of claims 10-11, wherein the seat part comprises a resilient layer, for example of a resilient material, such as polyurethane foam, which is attached to an upper surface of the reinforcement part, for example by gluing both parts together, or is detachable attached to an upper surface of the reinforcement member, for example by means of a Velcro connection. 15. Werkwijze volgens een van conclusies 10-14, waarbij gedurende het vormen van het verstevigingsdeel, ten minste een holte wordt voorzien in dat deel, welke holte zich bij voorkeur van een onderste oppervlak van dat deel in 20 een richting naar het tegenovergelegen oppervlak uitstrekt.15. Method as claimed in any of the claims 10-14, wherein during forming of the reinforcement part, at least one cavity is provided in that part, which cavity preferably extends from a lower surface of that part in a direction to the opposite surface . 16. Stoel, meer in het bijzonder een vliegtuigstoel, voorzien van een stoelkussen (1) volgens een van conclusies 1-9.Chair, more particularly an airplane seat, provided with a seat cushion (1) according to one of claims 1-9. 17. Stoel volgens conclusie 16, waarbij de stoel een frame omvat, waarbij het verstevigingsdeel is gekoppeld aan het frame en waarbij het zittingdeel verwijderbaar is voorzien op het frame dat het verstevigingsdeel omvat.The chair of claim 16, wherein the chair comprises a frame, wherein the reinforcement member is coupled to the frame and wherein the seat member is removably provided on the frame comprising the reinforcement member. 18. Voertuig, schip en/of vliegtuig, voorzien van een stoel volgens conclusie 30 16 of 17.18. Vehicle, ship and / or aircraft, provided with a seat according to claim 30 16 or 17.
NL2006525A 2011-04-01 2011-04-01 A seat cushion, for instance for an aircraft seat, and method for manufacturing such a seat cushion. NL2006525C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL2006525A NL2006525C2 (en) 2011-04-01 2011-04-01 A seat cushion, for instance for an aircraft seat, and method for manufacturing such a seat cushion.
EP12162502A EP2505104A1 (en) 2011-04-01 2012-03-30 A seat cushion, for instance for an aircraft seat, and a method for manufacturing such a seat cushion
US13/436,729 US9033420B2 (en) 2011-04-01 2012-03-30 Seat cushion, for instance for an aircraft seat, and a method for manufacturing such a seat cushion

Applications Claiming Priority (2)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006102969A1 (en) * 2005-03-30 2006-10-05 Intier Automotive Seating Systems Gmbh Automobile vehicle passenger seat and process for producing a vehicle passenger seat
WO2008103088A1 (en) * 2007-02-22 2008-08-28 Fagerdala Por-Pac Ab Auxiliary headrest with fastening means
US20090146472A1 (en) * 2007-12-06 2009-06-11 Lear Corporation Layered seating with directed deflection for child seat and occupant safety
US20110018329A1 (en) * 2009-07-27 2011-01-27 Lear Corporation Vehicle seating frame, assembly, and method of making

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006102969A1 (en) * 2005-03-30 2006-10-05 Intier Automotive Seating Systems Gmbh Automobile vehicle passenger seat and process for producing a vehicle passenger seat
WO2008103088A1 (en) * 2007-02-22 2008-08-28 Fagerdala Por-Pac Ab Auxiliary headrest with fastening means
US20090146472A1 (en) * 2007-12-06 2009-06-11 Lear Corporation Layered seating with directed deflection for child seat and occupant safety
US20110018329A1 (en) * 2009-07-27 2011-01-27 Lear Corporation Vehicle seating frame, assembly, and method of making

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