EP1971661A2 - Adhesive support for connecting parts to a molded body, and molded member featuring such an adhesive support - Google Patents

Adhesive support for connecting parts to a molded body, and molded member featuring such an adhesive support

Info

Publication number
EP1971661A2
EP1971661A2 EP06821069A EP06821069A EP1971661A2 EP 1971661 A2 EP1971661 A2 EP 1971661A2 EP 06821069 A EP06821069 A EP 06821069A EP 06821069 A EP06821069 A EP 06821069A EP 1971661 A2 EP1971661 A2 EP 1971661A2
Authority
EP
European Patent Office
Prior art keywords
layer
adhesive
support
adhesive support
retaining
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.)
Withdrawn
Application number
EP06821069A
Other languages
German (de)
French (fr)
Inventor
Piero Enrico Gilardi
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.)
TOSCANA GOMMA SpA
Original Assignee
TOSCANA GOMMA 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 TOSCANA GOMMA SpA filed Critical TOSCANA GOMMA SpA
Publication of EP1971661A2 publication Critical patent/EP1971661A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B60N2/002—Seats provided with an occupancy detection means mounted therein or thereon
    • 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
    • B60N2/58—Seat coverings
    • B60N2/5816—Seat coverings attachments thereof
    • B60N2/5875—Seat coverings attachments thereof by adhesion, e.g. gluing
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • C09J7/403—Adhesives in the form of films or foils characterised by release liners characterised by the structure of the release feature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R2021/01006—Mounting of electrical components in vehicles

Definitions

  • the present invention relates to an adhesive support for connecting parts to a molded body.
  • the seat portions of passenger seats are known to be fitted with presence detectors conveniently used to determine fastening of the seat belts, and which are normally fitted to the padding of the seat portion, normally made of molded polyurethane foam. Since the padding is normally covered with non-stick material to remove it from the mold, the detectors tend to move out of place, in use, thus impairing detection and associated follow-up functions. For this reason, the detectors are normally connected to flexible supports in turn secured, e.g. stitched, to the seat portion. Alternatively, an adhesive support is used comprising a sheet backing material, e.g.
  • the adhesive support Before the polyurethane foam is fed into the mold, the adhesive support is placed inside the mold, with the protection strip or film directly contacting the mold surface, and is held in place by magnets located inside the mold body to attract the iron powder and so draw the support onto the surface of the mold.
  • the backing material, resin, and iron powder are embedded and retained in place when the foam is inserted.
  • the above method has several drawbacks.
  • the iron powder and the magnets being spaced apart inside the mold, the retaining power of the magnets is affected not only by the distance, but also by the materials between them, with the result that the magnets are not always able to keep the adhesive support in the desired position.
  • the amount of iron powder is increased, but this inevitably increases the stiffness of the backing material-resin-iron powder structure, which, being incorporated in the molded body, results in unacceptable local hardening of the seat portion.
  • an adhesive support for connecting parts to a molded body, the support comprising a supporting and connecting body; a layer of adhesive material on an extensive surface of said supporting and connecting body; and a removable protection portion protecting said layer of adhesive material; and being characterized in that said protection portion comprises a layer of retaining material, and ferromagnetic material carried by said layer of retaining material.
  • said protection portion preferably also comprises a sheet material having an extensive surface covering said layer of adhesive material, and an opposite extensive surface covered by said layer of retaining material retaining said ferromagnetic material.
  • the present invention also relates to a molded member featuring an adhesive support.
  • a molded member featuring an adhesive support as claimed in Claim 5.
  • Figure 1 shows a partial section of a molded member in accordance with the teachings of the present invention
  • Figure 2 shows a partial section of a molded body and an adhesive support inside a mold
  • Figure 3 shows a larger-scale partial section of an adhesive support in Figures 1 and 2 in accordance with the teachings of the present invention.
  • BEST MODE FOR CARRYING OUT THE INVENTION Number 1 in Figure 1 indicates a molded member - in the example described, a seat portion of a vehicle seat - comprising a contoured body 2 made of soft material, e.g. flexible polyurethane foam; and an adhesive support 3 for connecting an emitting device A (shown schematically) , e.g. a detection or indicator sensor, to contoured body 2.
  • an emitting device A shown schematically
  • adhesive support 3 comprises a supporting and connecting body 4 defined by a sheet of non-woven fabric or plastic material or polyurethane foam material; a layer 6 of adhesive material on an extensive surface 7 of body 4; and a removable protection portion 8 protecting layer 6 of adhesive material.
  • Protection portion 8 comprises a sheet material 9, e.g. a treated paper material having an extensive non-stick surface 10 connected releasably to layer 6 of adhesive material, and an opposite extensive surface 11 covered with a structure 12 comprising powdered ferromagnetic material, e.g. iron powder, and a layer of retaining material for retaining the ferromagnetic material, e.g. a resin, conveniently acrylic resin.
  • the ferromagnetic material is incorporated in the resin.
  • the ferromagnetic material comprises extensive metal parts glued or soldered stably to the sheet material.
  • protection portion 8 has no sheet material 9, and structure 12 covers the layer of adhesive material directly.
  • Member 1 is formed in a mold 15 ( Figure 2) as follows.
  • Adhesive support 3 is first prepared outside mold 15 / and then inserted inside mold 15 in the desired position and held in place by a number of magnets 16 conveniently located along the peripheral edge of adhesive support 3 and cooperating with the ferromagnetic material. Once the adhesive support is positioned, the material defining contoured body 2 is fed into the mold and gradually embeds supporting and connecting body 4. Once body 2 is molded, body 2 and support 3 are extracted from the mold, and protection portion 8 is removed to expose the layer 6 of adhesive material, to which a corresponding portion of device A is connected.
  • adhesive support 3 as described provides for direct contact between magnets 16 and the ferromagnetic material, i.e. with no materials in between, thus securing support 3 firmly to mold 15.
  • the retaining power of the magnets is maximum when the magnets and the ferromagnetic material are in direct contact, but decreases drastically when they are separated by even only a few tenths of a millimetre.
  • the close proximity of the magnets and ferromagnetic material allows a reduction in the amount of ferromagnetic material used, and therefore in the manufacturing cost of the adhesive support, as compared with known solutions.
  • Providing the ferromagnetic material on the protection portion of the layer of adhesive material also improves comfort, in particular the softness of the contoured bodies produced, as compared with known solutions, on account of both the resin or equivalent retaining material and the retained ferromagnetic material being eliminated when device A is assembled.
  • adhesive support 3 may be made of materials other than those indicated by way of example. And, likewise, ferromagnetic materials other than those indicated may be used.
  • adhesive support 3 may be applied to molded bodies differing in shape and stiffness from the one indicated by way of example. In particular, adhesive support 3 as described may conveniently be applied to extra-soft bodies, on account of its characteristics, as stated, having substantially no effect on the overall softness of the body to which it is fitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)
  • Connection Of Plates (AREA)

Abstract

A molded member (1) has a contoured body (2) of soft material, and an adhesive support (3) for connecting a part (A) to the contoured body (2); the adhesive support (3) having a supporting and connecting body (4) at least partly embedded in the contoured body (2), a layer (6) of adhesive material on an extensive surface (7) of the supporting and connecting body (4), and a removable protection portion (8) protecting the layer of adhesive material; the protection portion (8) having a sheet material (9) supporting ferromagnetic powder incorporated in a layer of resin.

Description

ADHESIVE SUPPORT FOR CONNECTING PARTS TO A MOLDED BODY, AND MOLDED MEMBER FEATURING SUCH AN ADHESIVE SUPPORT
TECHNICAL FIELD The present invention relates to an adhesive support for connecting parts to a molded body.
Parts of various types often have to be fitted to and maintained in a stable position on molded bodies, members, or component parts. BACKGROUND ART
In the automotive industry, for example, the seat portions of passenger seats are known to be fitted with presence detectors conveniently used to determine fastening of the seat belts, and which are normally fitted to the padding of the seat portion, normally made of molded polyurethane foam. Since the padding is normally covered with non-stick material to remove it from the mold, the detectors tend to move out of place, in use, thus impairing detection and associated follow-up functions. For this reason, the detectors are normally connected to flexible supports in turn secured, e.g. stitched, to the seat portion. Alternatively, an adhesive support is used comprising a sheet backing material, e.g. of non-woven fabric, which, on one side, has a layer of adhesive material covered with a removable protection strip or film, and, on the other side, has a layer of resin containing iron powder. Before the polyurethane foam is fed into the mold, the adhesive support is placed inside the mold, with the protection strip or film directly contacting the mold surface, and is held in place by magnets located inside the mold body to attract the iron powder and so draw the support onto the surface of the mold. The backing material, resin, and iron powder are embedded and retained in place when the foam is inserted.
Though used, the above method has several drawbacks. First of all, the iron powder and the magnets being spaced apart inside the mold, the retaining power of the magnets is affected not only by the distance, but also by the materials between them, with the result that the magnets are not always able to keep the adhesive support in the desired position. To solve the problem, the amount of iron powder is increased, but this inevitably increases the stiffness of the backing material-resin-iron powder structure, which, being incorporated in the molded body, results in unacceptable local hardening of the seat portion. DISCLOSURE OF INVENTION
It is an object of the present invention to provide an adhesive support designed to provide a straightforward, low-cost solution to the above problems .
According to the present invention, there is provided an adhesive support for connecting parts to a molded body, the support comprising a supporting and connecting body; a layer of adhesive material on an extensive surface of said supporting and connecting body; and a removable protection portion protecting said layer of adhesive material; and being characterized in that said protection portion comprises a layer of retaining material, and ferromagnetic material carried by said layer of retaining material.
In the support defined above, said protection portion preferably also comprises a sheet material having an extensive surface covering said layer of adhesive material, and an opposite extensive surface covered by said layer of retaining material retaining said ferromagnetic material.
The present invention also relates to a molded member featuring an adhesive support.
According to the present invention, there is provided a molded member featuring an adhesive support as claimed in Claim 5.
BRIEF DESCRIPTION OF THE DRAWINGS
A non-limiting embodiment of the invention will be described by way of example with reference to the accompanying drawings, in which:
Figure 1 shows a partial section of a molded member in accordance with the teachings of the present invention;
Figure 2 shows a partial section of a molded body and an adhesive support inside a mold;
Figure 3 shows a larger-scale partial section of an adhesive support in Figures 1 and 2 in accordance with the teachings of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Number 1 in Figure 1 indicates a molded member - in the example described, a seat portion of a vehicle seat - comprising a contoured body 2 made of soft material, e.g. flexible polyurethane foam; and an adhesive support 3 for connecting an emitting device A (shown schematically) , e.g. a detection or indicator sensor, to contoured body 2.
With reference to Figures 2 and 3, adhesive support 3 comprises a supporting and connecting body 4 defined by a sheet of non-woven fabric or plastic material or polyurethane foam material; a layer 6 of adhesive material on an extensive surface 7 of body 4; and a removable protection portion 8 protecting layer 6 of adhesive material. Protection portion 8 comprises a sheet material 9, e.g. a treated paper material having an extensive non-stick surface 10 connected releasably to layer 6 of adhesive material, and an opposite extensive surface 11 covered with a structure 12 comprising powdered ferromagnetic material, e.g. iron powder, and a layer of retaining material for retaining the ferromagnetic material, e.g. a resin, conveniently acrylic resin. In the example described, the ferromagnetic material is incorporated in the resin. Alternatively, the ferromagnetic material comprises extensive metal parts glued or soldered stably to the sheet material.
In one variation, protection portion 8 has no sheet material 9, and structure 12 covers the layer of adhesive material directly.
Member 1 is formed in a mold 15 (Figure 2) as follows. Adhesive support 3 is first prepared outside mold 15/ and then inserted inside mold 15 in the desired position and held in place by a number of magnets 16 conveniently located along the peripheral edge of adhesive support 3 and cooperating with the ferromagnetic material. Once the adhesive support is positioned, the material defining contoured body 2 is fed into the mold and gradually embeds supporting and connecting body 4. Once body 2 is molded, body 2 and support 3 are extracted from the mold, and protection portion 8 is removed to expose the layer 6 of adhesive material, to which a corresponding portion of device A is connected.
As will be clear from the foregoing description, by virtue of the ferromagnetic material being carried by protection portion 8 of layer 6 of adhesive material, and so directly contacting the inner surface of mold 15 at the molding stage, adhesive support 3 as described provides for direct contact between magnets 16 and the ferromagnetic material, i.e. with no materials in between, thus securing support 3 firmly to mold 15. In this connection, it should be pointed out that the retaining power of the magnets is maximum when the magnets and the ferromagnetic material are in direct contact, but decreases drastically when they are separated by even only a few tenths of a millimetre. Moreover, for a given force exerted, the close proximity of the magnets and ferromagnetic material allows a reduction in the amount of ferromagnetic material used, and therefore in the manufacturing cost of the adhesive support, as compared with known solutions.
Providing the ferromagnetic material on the protection portion of the layer of adhesive material also improves comfort, in particular the softness of the contoured bodies produced, as compared with known solutions, on account of both the resin or equivalent retaining material and the retained ferromagnetic material being eliminated when device A is assembled.
Clearly, changes may be made to adhesive support 3 as described herein without, however, departing from the scope defined in the accompanying Claims. In particular, supporting and connecting body 4 and protection portion 8 may be made of materials other than those indicated by way of example. And, likewise, ferromagnetic materials other than those indicated may be used. Clearly, adhesive support 3 may be applied to molded bodies differing in shape and stiffness from the one indicated by way of example. In particular, adhesive support 3 as described may conveniently be applied to extra-soft bodies, on account of its characteristics, as stated, having substantially no effect on the overall softness of the body to which it is fitted.

Claims

1) An adhesive support for connecting parts to a molded body, the support comprising a supporting and connecting body; a layer of adhesive material on an extensive surface of said supporting and connecting body; and a removable protection portion protecting said layer of adhesive material; and being characterized in that said protection portion comprises a layer of retaining material, and ferromagnetic material carried by said layer of retaining material.
2) A support as claimed in Claim 1, characterized in that said protection portion also comprises a sheet material having an extensive surface covering said layer of adhesive material, and an opposite extensive surface covered by said layer of retaining material retaining said ferromagnetic material.
3) A support as claimed in Claim 1 or 2, characterized in that said ferromagnetic material is powdered material .
4) A support as claimed in any one of the foregoing Claims, characterized in that said layer of retaining material comprises a resin.
5) A molded member comprising a body of soft material, and an adhesive support for connecting a part to the body of soft material; the support comprising a supporting and connecting body at least partly embedded in said body of soft material, a layer of adhesive material on an extensive surface of said supporting and connecting body, and a removable protection portion protecting said layer of adhesive material; characterized in that said protection portion comprises a layer of retaining material, and ferromagnetic material carried by said layer of retaining material.
6) A member as claimed in Claim 5, characterized in that said protection portion also comprises a sheet material having an extensive surface covering said layer of adhesive material, and an opposite extensive surface covered by said layer of retaining material retaining said ferromagnetic material.
EP06821069A 2005-12-15 2006-12-14 Adhesive support for connecting parts to a molded body, and molded member featuring such an adhesive support Withdrawn EP1971661A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000870A ITTO20050870A1 (en) 2005-12-15 2005-12-15 ADHESIVE SUPPORT FOR THE CONNECTION OF DETAILS TO A BODY MADE OF MOLD AND ELEMENT MADE OF MOLD PROVIDED WITH THIS ADHESIVE SUPPORT
PCT/IB2006/003615 WO2007069056A2 (en) 2005-12-15 2006-12-14 Adhesive support for connecting parts to a molded body, and molded member featuring such an adhesive support

Publications (1)

Publication Number Publication Date
EP1971661A2 true EP1971661A2 (en) 2008-09-24

Family

ID=37964166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06821069A Withdrawn EP1971661A2 (en) 2005-12-15 2006-12-14 Adhesive support for connecting parts to a molded body, and molded member featuring such an adhesive support

Country Status (3)

Country Link
EP (1) EP1971661A2 (en)
IT (1) ITTO20050870A1 (en)
WO (1) WO2007069056A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100017084A1 (en) * 2021-06-29 2022-12-29 Toscana Gomma S P A STRUCTURAL ELEMENT FOR BODY MADE IN MOLD AND PROCEDURE FOR THE REALIZATION OF SUCH ELEMENT

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1769580A1 (en) * 1968-06-11 1971-10-21 Mosle Hueter Georg Dr Ing Magnetic cover sheet for adhesive foils and adhesive tapes
EP1318043B1 (en) * 1999-01-27 2009-02-25 The Furukawa Electric Co., Ltd. Occupant detecting device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2007069056A3 (en) 2007-10-04
ITTO20050870A1 (en) 2007-06-16
WO2007069056A2 (en) 2007-06-21

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