FR2582569A1 - Method of manufacturing a flexible pad for a product to be spread - Google Patents

Method of manufacturing a flexible pad for a product to be spread Download PDF

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Publication number
FR2582569A1
FR2582569A1 FR8508046A FR8508046A FR2582569A1 FR 2582569 A1 FR2582569 A1 FR 2582569A1 FR 8508046 A FR8508046 A FR 8508046A FR 8508046 A FR8508046 A FR 8508046A FR 2582569 A1 FR2582569 A1 FR 2582569A1
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France
Prior art keywords
face
support
hot iron
foam
welded
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Granted
Application number
FR8508046A
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French (fr)
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FR2582569B1 (en
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PLOT MICHEL
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PLOT MICHEL
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Priority to FR8508046A priority Critical patent/FR2582569B1/en
Publication of FR2582569A1 publication Critical patent/FR2582569A1/en
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Publication of FR2582569B1 publication Critical patent/FR2582569B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L23/00—Cleaning footwear
    • A47L23/04—Hand implements for shoe-cleaning, with or without applicators for shoe polish
    • A47L23/05—Hand implements for shoe-cleaning, with or without applicators for shoe polish with applicators for shoe polish
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0078—Measures or configurations for obtaining anchoring effects in the contact areas between layers
    • B29C37/0082—Mechanical anchoring
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/727—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
    • B29C66/7316—Surface properties
    • B29C66/73161—Roughness or rugosity
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/0044—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping edges or extremities
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • 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
    • B29K2001/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0633—LDPE, i.e. low density polyethylene
    • 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
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/065—HDPE, i.e. high density polyethylene
    • 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
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/74—Domestic articles
    • B29L2031/7406—Sponges; Cleaning equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

A multitude of peaks, such as points or ridges, is produced on a face to be bonded to a plastic support, this face is heated to a temperature causing the melting of the tops only of these peaks and a plastic foam is applied to this face by one of its faces, this one face being previously covered with a flock coating of plastic in order to thus produce a true bonding of the support to the foam.

Description

L'invention a pour objet un procédé de fabrication d'un tampon souple du type comprenant un support rigide qui est généralement en matière plastique et un bloc convenablement dimensionne qui est en matière souple comme de la mousse d'une matière plastique, de préférence à cellules ouvertes. The subject of the invention is a method of manufacturing a flexible tampon of the type comprising a rigid support which is generally made of plastic and a suitably sized block which is made of flexible material such as foam of a plastic material, preferably open cells.

Très généralement, le support est en polyéthylène à basse ou à haute densité, se moulant sous pression à 1800C environ et la mousse est de la mousse en polyester. On se référera donc, dans ce qui suit, à l'exemple d'un tampon ainsi constitué, mais, comme on le comprendra plus loin, le procédé de l'invention n'est pas limité à la réalisation d'un tampon composé de ces matières plastiques précises; de larges modifications dans le choix des matières plastiques sont possibles dans le cadre de l'invention. Very generally, the support is made of low or high density polyethylene, molded under pressure at about 1800C and the foam is polyester foam. Reference will therefore be made, in what follows, to the example of a buffer thus constituted, but, as will be understood below, the method of the invention is not limited to the production of a buffer composed of these precise plastics; large modifications in the choice of plastics are possible within the scope of the invention.

Jusqu'à présent, la fabrication d'un tampon de ce type se fait par collage, à l'aide d'un adhésif ou d'une colle compatible avec les deux matières plastiques qui composent d'une part le support, d'autre part le bloc de mousse. Until now, the manufacture of a pad of this type is done by gluing, using an adhesive or glue compatible with the two plastics which make up the support on the one hand, on the other share the foam block.

Ce mode de fabrication est lent, et coûteux en raison du prix de la colle employée; en outre la fixation ainsi réalisée n'a pas toujours une résistance suffisamment durable dans le temps.This manufacturing method is slow and expensive because of the price of the adhesive used; furthermore, the fixing thus produced does not always have a sufficiently durable resistance over time.

A partir d'un support en matière plastique, par exemple en polyéthylène à haute ou basse densité se moulant à 1800C environ, ayant une face destinée à la fixation d'un bloc d'une mousse de matière plastique, par exemple en mousse de polyester à cellules ouvertes, selon le procédé de l'invention on donne à ladite face du support un état de surface rugueux présentant une multitude de sommets isolés, en surélévation par rapport au reste de la face, se terminant par une aire de dimension très faible à nulle, de préférence également répartis sur ladite face, on chauffe cette multitude de sommets isolés à une température déterminée pendant une durée déterminée provoquant une fusion de la cime de ces sommets sans provoquer le ramollissement du reste de la face, on applique aussitôt le bloc de mousse sur l'ensemble des sommets pendant une durée suffisante à leur raffermissement. From a plastic support, for example high or low density polyethylene molded at around 1800C, having a face intended for fixing a block of a plastic foam, for example polyester foam with open cells, according to the method of the invention, said face of the support is given a rough surface state having a multitude of isolated vertices, in elevation relative to the rest of the face, ending in an area of very small dimension at zero, preferably also distributed over said face, this multitude of isolated peaks is heated to a determined temperature for a determined period causing the crown of these peaks to melt without causing the rest of the face to soften, the block of foam on all the peaks for a period sufficient for their firming.

IL se produit à chaque zone de contact d'une cime en fusion avec la mousse une fusion locale de celle-ci et une soudure avec le support, La multitude de ces zones de soudure assure une fixation solide et durable de la mousse au support. IT occurs at each contact zone of a crown in fusion with the foam a local fusion of the latter and a weld with the support, The multitude of these weld zones ensures a solid and durable fixing of the foam to the support.

On peut réaliser la multitude des sommets au moment de la fabrication par moulage du support et soumettre ces sommets k l'effet de la chaleur juste au moment de l'opération de soudure
Il est possible aussi, et préférable, de réaliser la multitude des sommets juste avant l'opération de soudure, à partir d'une face lisse du support, pendant l'opération de chauffage qui précède l'opération de soudure. Dans cet esprit on utilise un fer chaud ayant une face à état de surface rugueux qui est la réplique en négatif de la face à réaliser sur le support.The multitude of peaks can be produced at the time of manufacture by molding the support and subject these peaks to the effect of heat just at the time of the welding operation.
It is also possible, and preferable, to produce the multitude of vertices just before the welding operation, from a smooth face of the support, during the heating operation which precedes the welding operation. In this spirit, we use a hot iron with a rough surface surface which is the negative replica of the surface to be produced on the support.

Avantageusement, pour parvenir à une production plus rapide, à partir d'un support froid et à face lisse, on effectue L'opération de chauffage en deux phases successives à l'aide de deux fers chauds, le premier exécutant un préchauffage et le second le chauffage final. Dans une fabrication en série ces deux phases de préchauffage et de chauffage sont exécutées simultanément sur deux supports qui se suivent, ce qui divise par deux la durée de l'opération de chauffage,
Le premier fer peut avoir une face lisse mais il est préférable de lui donner aussi une face à état de surface rugueux; cette mesure facilite et accélère la formation convenable sur le support de la face désirée, sous l'effet du second fer chaud, De préférence, Les deux fers chauds ont des faces chauffantes identiques et, avantageusement, on leur donne une position ou une orientation identiques afin que la face rugueuse du deuxième fer chaud vienne s'appliquer dans l'empreinte du premier fer chaud ébauchée sur le support pendant la phase de préchauffage. Advantageously, to achieve faster production, from a cold support and with a smooth face, the heating operation is carried out in two successive phases using two hot irons, the first performing preheating and the second final heating. In mass production, these two preheating and heating phases are carried out simultaneously on two successive supports, which halves the duration of the heating operation,
The first iron can have a smooth face but it is preferable to also give it a rough surface face; this measure facilitates and accelerates the proper formation on the support of the desired face, under the effect of the second hot iron, Preferably, The two hot irons have identical heating faces and, advantageously, they are given an identical position or orientation so that the rough surface of the second hot iron comes to be applied in the imprint of the first hot iron sketched on the support during the preheating phase.

Les fers chauds sont réalisables en acier; ils sont
creux et contiennent une résistance chauffante électrique.Hot irons are available in steel; they are
hollow and contain an electric heating resistance.

Dans une fabrication en série, la température des fers
chauds évolue dans une gamme étroite de températures. L'in
tensité du courant est contrôlée pour que cette température
se trouve à la valeur qui convient à L'opération de chåuf-
fage du support.In mass production, the temperature of the irons
heat evolves in a narrow range of temperatures. Linen
current density is controlled so that this temperature
is at the value which is suitable for the operation of chåuf-
support fage.

Il est préférable d'utiliser des fers chauds dont
la face active est couverte d'une substance anti-adhésive,
par exemple d'une couche de PTFE (connu aussi sous la mar
que Téflon), comme le sont certains récipients pour la
cuisine, ainsi qu'il est connu.It is best to use hot irons with
the active side is covered with a non-stick substance,
for example a layer of PTFE (also known as mar
as Teflon), as are some containers for
cooking, as it is known.

Il est préférable aussi de faire subir à la face à
souder du bloc de mousse une opération de renforcement de
sa structure. Une mousse présente à sa surface une quantité
de volumes vides limités par une matrice de matière. La sou
dure ne concerne que la matière de la matrice. Si on rem
plit d'une matière qui adhère à la matrice les volumes
vides la soudure concernera à la fois la matière de La
matrice et la matière de remplissage, ce qui renforcera la
soudure. Ce renforcement n'a pas besoin de s'étendre sur
une épaisseur importante : il suffit qu'il concerne une zone
d'épaisseur égale à la zone concernée par la soudure elle
même.It is also preferable to subject the face to
weld from the foam block a reinforcement operation
its structure. A foam has on its surface a quantity
empty volumes limited by a matrix of matter. The penny
hard only concerns the material of the matrix. If we rem
fold of a material which adheres to the matrix the volumes
the welding will concern both the material of La
matrix and filling material, which will strengthen the
welding. This reinforcement does not need to extend over
a significant thickness: it suffices that it concerns an area
of thickness equal to the zone concerned by the weld it
even.

Avantageusement, selon l'invention, on réalise ce
renforcement superficiel par une opération préliminaire
connue en soi telle que le flocage d'une matière plastique
exécutée sur la face à souder du bloc de mousse. La matière
plastique utilisée pour le flocage peut avoir une tempéra
ture de fusion supérieure à celle du support et à celle du bloc de mousse. En variante on peut utiliserdes fibres à base de cel
lulose. Par exemple, avec les matières mentionnées plus
haut à titre d'exemple, la matière utilisée pour le flocage
est de préférence des fibres de viscose.Avec une
mousse ayant une face à souder ainsi renforcée, la tempera
ture des fers chauds à la fin des phases de préchauf
fage et de chauffage est de 265 CC, après une durée de con
tact de chaque fer avec le support de 3 à 4 secondes et un
intervalle de 1 s à peine entre chaque support chauffé.Advantageously, according to the invention, this is carried out
surface reinforcement by preliminary operation
known per se such as the flocking of a plastic material
executed on the weld side of the foam block. Matter
plastic used for flocking can have a tempera
higher than the support and the foam block. Alternatively, fibers based on this may be used
lulose. For example, with the subjects mentioned more
top as an example, the material used for the flocking
is preferably viscose fibers.
foam having a welded face thus reinforced, the tempera
ture of hot irons at the end of the preheating phases
fage and heating is 265 CC, after a con
tact of each iron with the support of 3 to 4 seconds and a
barely 1 s interval between each heated support.

L'expression "multitude de sommets isolés terminés
par une aire de dimension très faible à nulle" désigne un
face présentant de nombreuses pointes effilées, se termi
nant par une aire pratiquement nulle, ou de nombreux troncs
de cylindres ou de cônes se terminant par une aire minime,
ou encore de nombreux carrés d'un quadrillage fin du genre
dit à pointes de diamant. Cette expression englobe aussi le
cas de nombreuses nervures parallèles à section droite
constante ou décr-oissante jusqu a un sommet constitué par
une arête fine.The expression "multitude of isolated summits completed
by an area of very small dimension at zero "designates a
face with many tapered tips, ends
coming from a practically zero area, or from numerous trunks
cylinders or cones ending in a minimal area,
or many squares of a fine grid of the kind
said with diamond tips. This expression also includes the
many parallel ribs with cross section
constant or decreasing up to a vertex constituted by
a fine edge.

Il n'est pas possible de donner des indications
chiffrées précises à ce sujet, ce qui est important c'est
de créer sur La face à souder du support après chauffage
une multitude de sommets, c'est-à-dire de points ou d'arê
tes en fusion juste à Leur cime suivie d'un état ramolli
s'éloignant de plus en pLus de la fusion quand on s'éloigne
du sommet, alors que Le reste de la face est à une tempé
rature plus basse. La matière adhésive recouvrant la face
active des fers chauds évite l'étirement de la matière en
filaments quand Le fer chaud quitte le support. Il est
important ensuite d'appLiquer rapidement le bloc de mousse
sur la face chauffée du support, en une seconde au plus et
de préférence en 0,75 s environ. Une durée de 3 à 4 s de
contact entre le bloc de mousse et le support chauffé suf
fit pour assurer la soudure.It is not possible to give indications
precise figures on this, what is important is
to create on the weld face of the support after heating
a multitude of vertices, i.e. points or arcs
your molten just at their peak followed by a softened state
moving further and further away from the merger as one moves away
from the top, while the rest of the face is at a tempé
lower erasure. The adhesive material covering the face
activates hot irons prevents stretching of the material
filaments when the hot iron leaves the support. It is
then important to quickly apply the foam block
on the heated side of the support, in no more than a second and
preferably in about 0.75 s. A duration of 3 to 4 s of
contact between the foam block and the suf heated support
fit for soldering.

En procédant comme expliqué ci-dessus, en adoptant
les dispositions les plus favorables, c'est-à-dire avec
une face de la mousse renforcée par un flocage préalable de fibres de viscose avec un fer chaud de préchauffage et un fer
chaud de chauffage ayant chacun une face active à quadril
lage à pointes de diamant à lignes parallèles espacées de 1,8 mm, couverte d'une couche de quelques microns de PTFE, en chauffant ces fers à une température de 2650c en fin de phase de préchauffage et de chauffage, en utilisant un sup
haut e ou port en polyéthylène/basse densité et un bloc de mousse en polyester , on peut fabriquer des tampons qui supportent des essais normalisés connus de résistance au frottement pendant plus de 2000 cycles de courses d'aller et de retour.By proceeding as explained above, by adopting
the most favorable provisions, i.e. with
one side of the foam reinforced by a prior flocking of viscose fibers with a hot preheating iron and an iron
heating heat each having an active quadrilateral face
diamond point lage with parallel lines spaced 1.8 mm apart, covered with a layer of a few microns of PTFE, by heating these irons to a temperature of 2650c at the end of the preheating and heating phase, using a sup
high or low polyethylene / density port and a polyester foam block, pads can be made to withstand known standard friction resistance tests for more than 2000 round-trip cycles.

Les tampons de ce genre sont largement utilisés dans le domaine de l'entretien du cuir et des matières analogues, notamment des chaussures, pour l'application et l'étalement sans se salir les doigts de produits d'entretien comme le cirage ou des crèmes analogues. Etant donné leur grande résistance à l'usage, les tampons obtenus selon le procédé de l'invention permettent d'élargir le domaine de leur emploi. Tampons of this kind are widely used in the maintenance of leather and the like, especially shoes, for application and spreading without dirtying the fingers of cleaning products such as shoe polish or creams. analogues. Given their great resistance to use, the tampons obtained according to the method of the invention make it possible to widen the field of their use.

L'invention couvre aussi les tampons composés d'un support en matière plastique et d'un bloc de mousse de matière plastique dans lesquels le bloc de mousse est soudé au support sur une face de celle-ci. Après enlèvement de la mousse, par arrachement et grattage mécaniques, ou par dissolution à l'aide d'un solvant qui n'attaque pas le support, on peut constater que ladite face de ce dernier présente un état de surface irrégulier et rugueux, ayant de nombreux sommets adoucis provenant des points ou des arêtes dont la fusion a arrondi le contour.  The invention also covers the pads composed of a plastic support and a plastic foam block in which the foam block is welded to the support on one side thereof. After removal of the foam, by mechanical stripping and scraping, or by dissolution using a solvent which does not attack the support, it can be seen that said face of the latter has an irregular and rough surface state, having many softened vertices coming from points or edges whose fusion has rounded the outline.

Claims (15)

REVEND I C AT IONSRESELL I C AT IONS 1. Procédé de fabrication d'un tampon comprenant un support en matière plastique ayant une face destinée à 1. A method of manufacturing a tampon comprising a plastic support having a face intended to La fixation d'une face d'un bloc d'une mousse de matière plastique, caractérisé en ce qu'on donne à ladite face du support un état de su-rface rugueux présentant une multitude de sommets en surélévation par rapport au reste de la face se terminant chacun par une aire de dimension très faible à nulle, on chauffe cette multitude de sommets à une température provoquant la fusion de la cime de ces sommets sans provoquer le ramollissement du reste de Ladite face, on applique aussitôt le bloc de mousse sur l'ensemble des sommets pendant une durée suffisante à leur soudure avec cette mousse et à leur raffermissement.The fixing of a face of a block of plastic foam, characterized in that said surface of the support is given a rough surface with a multitude of vertices in elevation relative to the rest of the face each ending in a very small area at zero, this multitude of peaks is heated to a temperature causing the tops of these peaks to melt without causing the remainder of said peak to soften, the foam block is immediately applied to all the peaks for a sufficient time to weld them with this foam and to firm them up. 2. Procédé selon La revendication 1, caractérisé en ce qu'on réalise d'abord l'état de surface rugueux de la face à souder du support et on chauffe ensuite cette face. 2. Method according to claim 1, characterized in that the rough surface condition of the surface to be welded of the support is first produced and this surface is then heated. 3. Procédé selon la revendication 1, caractérisé en ce qu'on réalise L'état de surface rugueux de la face à souder du support simultanément à l'opération de chauffage avant soudure. 3. Method according to claim 1, characterized in that the rough surface state of the surface to be welded of the support is produced simultaneously with the heating operation before welding. 4. Procédé selon la revendication 3, caractérisé en ce qu'on utilise au moins un fer chaud ayant une face active qui présente ta réplique en négatif de l'état de surface rugueux désiré pour réaliser cet état de surface sur la face du support et chauffer simultanément cette face avant soudure. 4. Method according to claim 3, characterized in that at least one hot iron having an active face is used which presents your negative replica of the rough surface state desired to achieve this surface state on the face of the support and simultaneously heat this face before welding. 5. Procédé selon la revendication 4, caractérisé en ce qu'on utilise un premier fer chaud pour réaliser un préchauffage de la face à souder du support et un second fer chaud pour terminer l'opération de chauffage. 5. Method according to claim 4, characterized in that a first hot iron is used to preheat the welding face of the support and a second hot iron to complete the heating operation. 6. Procédé selon la revendication 5, caractérisé en ce qu'on utilise un premier fer chaud et un second fer chaud qui ont chacun une face active conforme à la revendication 4, ces faces étant disposées et orientées pour que les sommets existants sur le second fer chaud pénètrent dans les empreintes des sommets ébauchées dans La face à souder du support par la face active du premier fer chaud. 6. Method according to claim 5, characterized in that a first hot iron and a second hot iron are used which each have an active face in accordance with claim 4, these faces being arranged and oriented so that the vertices existing on the second hot iron penetrate into the imprints of the vertices outlined in The face to be welded of the support by the active face of the first hot iron. 7. Procédé selon la revendication 6 caractérisé en ce qu'on chauffe les deux fers chauds à des températures sensiblement identiques. 7. Method according to claim 6 characterized in that the two hot irons are heated to substantially identical temperatures. 8. Procédé selon la revendication 4 caractérisé en ce que la face active du ou des fers chauds a été recouverte préalablement d'une substance anti-adhésive telle que le 8. Method according to claim 4 characterized in that the active face of the hot iron (s) has been previously coated with a non-stick substance such as PTFE.PTFE. 9. Procédé selon la revendication 1 caractérisé en ce qu'on soumet préalablement la face à souder du bloc de mousse à une opération de renforcement consistant à en boucher superficiellement les cellules par une matière de remplissage. 9. Method according to claim 1 characterized in that the surface to be welded of the block of foam is subjected beforehand to a reinforcement operation consisting in surface sealing the cells with a filling material. 10. Procédé selon la revendication 9 caractérisé en ce qu'on exécute ledit renforcement par une opération connue en soi de flocage d'une matière plastique. 10. Method according to claim 9 characterized in that said reinforcement is carried out by an operation known per se of flocking of a plastic material. 11. Procédé selon la revendication 9 caractérisé en ce qu'on exécute ledit renforcement par une opération connue en soi de flocage de fibres à base de cellulose comme des fibres de viscose. 11. The method of claim 9 characterized in that said reinforcement is carried out by an operation known per se of flocking of cellulose-based fibers such as viscose fibers. 12. Procédé selon La revendication 1 caractérisé en ce que l'état de surface rugueux est obtenu par un quadrillage à pointes de diamant. 12. Method according to claim 1 characterized in that the rough surface condition is obtained by a diamond-point grid. 13. Procédé selon la revendication 1 caractérisé en ce qu'on utilise un support en polyéthylène basse ou haute densité et un bloc de mousse en polyester avec une face à souder couverte d'une couche floquée de fibres de viscose. 13. Method according to claim 1 characterized in that a support is made of low or high density polyethylene and a block of polyester foam with a side to be welded covered with a flocked layer of viscose fibers. 14. Procédé selon la revendication 13 caractérisé en ce qu'on réalise sur la face à souder du support l'état de surface rugueux désiré en utilisant un premier fer chaud dans une phase de préchauffage et un second fer chaud dans une phase de chauffage final, ces deux fers ayant chacun une face active à état de surface rugueux négatif couverte de 14. The method of claim 13 characterized in that one realizes on the side to be welded of the support the desired rough surface state by using a first hot iron in a preheating phase and a second hot iron in a final heating phase , these two irons each having an active face with a rough rough surface state covered with PTFE et étant tenus chacun à une température de 2650C envi ron en fin de phase de préchauffage et de chauffage, avec une durée de contact avec le support de 3 à 4 s et un inter valle entre les supports à chauffer de 1 seconde au plus.PTFE and each being kept at a temperature of around 2650C at the end of the preheating and heating phase, with a contact time with the support of 3 to 4 s and an interval between the supports to be heated of 1 second at most. 15, Tampon comprenant un support en matière plastique ayant une face à laquelle est fixé par une de ses faces un bloc de mousse en matière plastique, caractérisé en ce que les deux faces sont fixées l'une à l'autre par une opération de soudure obtenue par la fusion sur La face à soude du support de la cime d'une multitude de sommets réalisés su cette face et ayant, après soudure, une apparence adoucie.  15, tampon comprising a plastic support having a face to which a block of plastic foam is fixed by one of its faces, characterized in that the two faces are fixed to one another by a welding operation obtained by the fusion on the soda face of the crown support of a multitude of vertices made on this face and having, after welding, a softened appearance.
FR8508046A 1985-05-29 1985-05-29 PROCESS FOR THE MANUFACTURE OF A FLEXIBLE PAD FOR A PRODUCT TO BE DISPLAYED Expired FR2582569B1 (en)

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Application Number Priority Date Filing Date Title
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FR2582569B1 FR2582569B1 (en) 1988-01-29

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0687507A3 (en) * 1994-06-17 1996-11-20 Werner & Mertz Gmbh Apparatus for dispensing pasty product on surfaces
WO2003029098A1 (en) * 2001-10-01 2003-04-10 L'oreal Device comprising a porous, cellular or fibrous element which is fixed to a support

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3219742A (en) * 1961-09-14 1965-11-23 Funck Kg Dr Ing Method of welding fast together objects or shaped parts of thermoplastic materials
LU55109A1 (en) * 1966-12-16 1968-03-05
US3473991A (en) * 1966-03-16 1969-10-21 Pentapco Inc Method for bonding a plastic foam pad onto,and without warping,a heatwarpalle thermoplastic body member
CH493325A (en) * 1969-07-09 1970-07-15 Zuehlke & Braendli Ag Method and apparatus for securing a plastic - sponge to a plastic backing
GB1254957A (en) * 1969-06-03 1971-11-24 Baumann A G Method for connecting foam materials to thermoplastic bodies
DE2433533A1 (en) * 1973-10-01 1975-04-10 Zentralinstitut Schweiss Heating-welding tool for thermoplastic materials - having working faces profiled in parallel manner relative to each other to increase joining face

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3219742A (en) * 1961-09-14 1965-11-23 Funck Kg Dr Ing Method of welding fast together objects or shaped parts of thermoplastic materials
US3473991A (en) * 1966-03-16 1969-10-21 Pentapco Inc Method for bonding a plastic foam pad onto,and without warping,a heatwarpalle thermoplastic body member
LU55109A1 (en) * 1966-12-16 1968-03-05
GB1254957A (en) * 1969-06-03 1971-11-24 Baumann A G Method for connecting foam materials to thermoplastic bodies
CH493325A (en) * 1969-07-09 1970-07-15 Zuehlke & Braendli Ag Method and apparatus for securing a plastic - sponge to a plastic backing
DE2433533A1 (en) * 1973-10-01 1975-04-10 Zentralinstitut Schweiss Heating-welding tool for thermoplastic materials - having working faces profiled in parallel manner relative to each other to increase joining face

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0687507A3 (en) * 1994-06-17 1996-11-20 Werner & Mertz Gmbh Apparatus for dispensing pasty product on surfaces
WO2003029098A1 (en) * 2001-10-01 2003-04-10 L'oreal Device comprising a porous, cellular or fibrous element which is fixed to a support

Also Published As

Publication number Publication date
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