WO2006085206A1 - Procedure for flocking profiles and flocked profile produced thereby - Google Patents

Procedure for flocking profiles and flocked profile produced thereby Download PDF

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Publication number
WO2006085206A1
WO2006085206A1 PCT/IB2006/000267 IB2006000267W WO2006085206A1 WO 2006085206 A1 WO2006085206 A1 WO 2006085206A1 IB 2006000267 W IB2006000267 W IB 2006000267W WO 2006085206 A1 WO2006085206 A1 WO 2006085206A1
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WO
WIPO (PCT)
Prior art keywords
profile
flocked
tape
rubber
rubber profile
Prior art date
Application number
PCT/IB2006/000267
Other languages
French (fr)
Inventor
Ramon Fernandez Garrido
Original Assignee
Gdx North America Inc.
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 Gdx North America Inc. filed Critical Gdx North America Inc.
Priority to EP06710358A priority Critical patent/EP1846220A1/en
Publication of WO2006085206A1 publication Critical patent/WO2006085206A1/en

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Classifications

    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
    • 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
    • B29C65/022—Particular heating or welding methods not otherwise provided for
    • B29C65/028—Particular heating or welding methods not otherwise provided for making use of inherent heat, i.e. the heat for the joining comes from the moulding process of one 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • 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
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J10/00—Sealing arrangements
    • B60J10/15—Sealing arrangements characterised by the material
    • B60J10/17—Sealing arrangements characterised by the material provided with a low-friction material on the surface
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/472—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially flat
    • B29C66/4722—Fixing strips to surfaces other than edge faces
    • 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
    • B29K2021/00—Use of unspecified rubbers 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
    • 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
    • B29L2031/001—Profiled members, e.g. beams, sections
    • B29L2031/003—Profiled members, e.g. beams, sections having a profiled transverse cross-section
    • 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
    • B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints
    • 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
    • B29L2031/765—Articles provided with piles, e g. nap on cloth

Definitions

  • the present invention is intended to disclose a procedure for the flocking of profiles as well as the flocked profile produced thereby.
  • the term "flock" relates in different technical sectors to a surface of velvety characteristics .
  • the present invention relates to the sector of profiles made, for example, from rubber .
  • Said type of flocked rubber profiles such as for example EPDM (non-conjugated ethylene-propylene-diene terpolymer) are used, for example, in the automobile sector, to make outer seals on sliding car windows , thanks to the excellent properties of resistance to atmospheric conditions of EPDM rubber .
  • Said profiles have a velvety surface, known as flocked, which has the function of reducing the friction of the window with the profile .
  • the method known until now for the flocking of surfaces in rubber profiles in a line consists of passing the profile during the extrusion process through a chamber or area with controlled temperature and humidity where an adhesive is applied to the surface of the profile to be flocked and the flock is then deposited by ' electrostatic fields . After leaving the flocking chamber or area, the profile is introduced into a hot channel or oven so that it polymerises the adhesive used by heat .
  • This method has several drawbacks , including the following : -
  • the profiles typically require a very narrow flocked surface in comparison with the width of the profile, meaning that the installation has a low yield.
  • the quality of the flocking produced is not totally satisfactory, as the hairs comprising the flock do not remain perpendicular to the flocked surface , but form a variable angle with the surface as a function of the curve thereof and its spatial position.
  • procedure for the flocking of rubber profiles characterized in that it comprises the steps of providing a flocked tape which has a desired width of flock and whose base , intended to come into contact with the surface of the profile, comprises an olefinic compound chemically compatible with a polymer present in the rubber profile ; heating of the rubber profile and the flocked tape ; and forming a contact bond between the rubber profile and the flocked tape .
  • flocked rubber profile produced according to a procedure in accordance with any of claims 1 to 8 , characterized in that it comprises a rubber profile tightly bonded to a flocked tape which has a base that comprises an olefinic element chemically compatible with a polymer present in the rubber profile .
  • a flocked sealing profile comprising flocked tape which has a desired width of flock and a base, intended to come into contact with the surface of the profile , characterised in that the base comprises an olefinic compound chemically compatible with a polymer present in the rubber profile, and in that the rubber profile and the flocked tape are contact bonded together by applying heat .
  • Obj ects of the embodiment of the present invention to be described in detail below are to achieve a flocking system for rubber profiles which requires an installation occupying the least possible space , has a better yield and whereby a flopk of bette.r quality is produced than using the procedures currently known for this type of profiles .
  • the embodiment provides for the use of a flocked tape which has previously been cut to the required width and it is brought into contact with the rubber profile at a suitable temperature, producing a tight bond between the rubber and the flocked tape .
  • Rubbers are heat-stable materials , which means that to achieve the bond by heating and contact provided by the embodiment , the flocked tape, which may be of the type commercially available, should include in its base, intended to make contact with the profile surface, an olefinic element compatible with one of the polymers which form part of the rubber formulation .
  • the tests and experiments performed by the inventors show that the presence of said olefinic element on the base of the tape, surprisingly, enables a tight , long-lasting heat bond with the rubber profile, despite the known fact that rubbers are heat-stable materials , i . e . they do not flow as the temperature increases .
  • the heating temperature of the tape should preferably be close to the melting point of the selected olefinic component . '
  • the olefinic component will be short-chain . More preferably, this will be ethylene .
  • the olefinic component present in the base of the tape may be added as an additive thereto .
  • the flocked tape being a normal product on the market , and previously cut to the desired width, may come from a reel during the flocking process .
  • the present invention also provides a flocked profile obtained using the flocking procedure .
  • This rubber profile may have tightly bonded to its surface a flocked tape of the type commercially available , formed by a base and a flock, in which there is no intermediate adhesive between both components .
  • the embodiment has numerous advantages over those previously known, amongst which can be cited : - : Reduced investment in the flocking line .
  • the space necessary to apply the flocked tape is approximately two metres , much less than with the known procedure . Constant quality of the flock throughout the profile .
  • Figure 1 is a diagram which represents a process of manufacturing a flocked rubber profile which uses the flocking procedure according to the present invention .
  • Figure 2 is a perspective view of a flocked tape , in rolled up position, and already cut to be applied to a profile, with a detail of its flocked side .
  • Figure 3 is another perspective view of the tape of figure 2 in which a detail of the side intended to make contact with the surface of the rubber profile is shown.
  • Figure 4 is a cross-section view of a profile according to the present invention in which the bonding process between the profile and the flocked tape has been represented diagrammatically.
  • Figure 5 is a front elevation view of a flocked rubber profile produced • according to the present invention .
  • Figure 6 is a cross-section view according to the plane VI-VI of figure 5.
  • Figure 7 is a rear elevation view of the profile of figure 5.
  • Figure 8 is a detail of the flocked area of the section of figure 6 , which shows in additional detail the bond between the rubber profile and the flocked profile .
  • Figure 1 shows the manufacturing process of a flocked EPDM profile 1 , in which the procedure is used according to the present invention .
  • the manufacturing of a rubber profile comprises , typically, the step of extrusion of the profile 2 , which precedes a vulcanization phase by microwaves or UHF vulcanization, indicated in the drawing by the reference numeral 3 , and a subsequent vulcanization phase by adding heat in a gas channel , indicated in the drawing by the reference numeral 4.
  • the profile 1 passes to the flocking area 5.
  • both the profile 1 and the flocked tape 6 pass to an area 7 where they are heated and then to an area 8 where they come into contact with one another, making the bond, and producing the flocked profile .
  • the flocked tape 6 has been previously cut to the desired width (which, typically for the application shown in the example, ranges from 5 to 30 mm) , and enters the flocking area 5 from a motorized unwinder 9 which unwinds a spool of tape 6 so that the linear advance speed of the tape 6 is equal to the extrusion rate of the profile .
  • the flocked tape 6 (see figures 2 and 3 ) is of the type available commercially .
  • the tape comprises a flocked side 10 on a base 11 intended to come into contact with the surface of the profile .
  • the base 11 comprises an olefinic compound which is chemically compatible with one of the EPDM polymers of the profile, for example ethylene, which guarantees that , if we heat the surface 11 of the tape 6 to a temperature close to the melting point of the olefinic compound and we heat the surface of the EPDM profile appropriately, they bond by simple contact , as can be observed diagrammaticalIy in figure 4 , in which the contact has been represented by arrows A, and the temperature by wavy lines B . That is, there is no intermediate adhesive between the base 11 and the profile 1 ; they are bonded directly to one another .
  • the heating temperature of the surface of the EPDM profile 1 should be in the order of the melting temperature of the polymer which will achieve the bond with the olefinic component of the base 11 of the tape , but in any case lower than the degradation temperature of the EPDM .
  • the present embodiment provides for the addition, as an additive to the EPDM composition, of an olefinic compound compatible with the present flocked tape 6 to favour the bond between profile and tape .
  • Figures 5 to 8 show an EPDM profile intended to serve as a seal in a window 1 with a sliding pane , produced using the procedure of figure 1.
  • the rubber profile 1 is characterized in that it has a rubber profile joined to a flocked tape 6 comprising a base 11 which has a flocked side 10 , the tape 6 being tightl y bonded to the profile without the presence of an adhesive between both components .
  • the hairs of the flocked surface 10 are essentially perpendicular to the surface throughout .

Abstract

Procedure for flocking rubber profile, which comprises the steps of providing a flocked tape (6) which has the desired width of flock (10) and whose base (11), intended to make contact with the surface of the profile comprises an olefinic compound chemically compatible with a polymer present in the rubber profile (1); heating of the rubber profile (1) and the flocked tape; and forming a contact bond between the rubber profile (1) and the flocked tape (6).

Description

PROCEDURE FOR FLOCKING PROFILES AND FLOCKED PROFILE PRODUCED THEREBY
TECHNICAL FIELD
The present invention is intended to disclose a procedure for the flocking of profiles as well as the flocked profile produced thereby. The term "flock" relates in different technical sectors to a surface of velvety characteristics . In particular, the present invention relates to the sector of profiles made, for example, from rubber .
BACKGROUND ART
Said type of flocked rubber profiles , such as for example EPDM (non-conjugated ethylene-propylene-diene terpolymer) are used, for example, in the automobile sector, to make outer seals on sliding car windows , thanks to the excellent properties of resistance to atmospheric conditions of EPDM rubber . Said profiles have a velvety surface, known as flocked, which has the function of reducing the friction of the window with the profile .
The method known until now for the flocking of surfaces in rubber profiles in a line consists of passing the profile during the extrusion process through a chamber or area with controlled temperature and humidity where an adhesive is applied to the surface of the profile to be flocked and the flock is then deposited by ' electrostatic fields . After leaving the flocking chamber or area, the profile is introduced into a hot channel or oven so that it polymerises the adhesive used by heat .
This method has several drawbacks , including the following : - The profiles typically require a very narrow flocked surface in comparison with the width of the profile, meaning that the installation has a low yield.
- It requires an installation of great length for flocking in line (in the order of 50 or 60 metres) . - Both the rate of flocking and the extrusion rate of the profile are limited by the cross- linking time of the adhesive in the hot channel .
- The quality of the flocking produced is not totally satisfactory, as the hairs comprising the flock do not remain perpendicular to the flocked surface , but form a variable angle with the surface as a function of the curve thereof and its spatial position.
SUMMARY OF THE INVENTION
According to a first aspect of the invention, there is provided procedure for the flocking of rubber profiles , characterized in that it comprises the steps of providing a flocked tape which has a desired width of flock and whose base , intended to come into contact with the surface of the profile, comprises an olefinic compound chemically compatible with a polymer present in the rubber profile ; heating of the rubber profile and the flocked tape ; and forming a contact bond between the rubber profile and the flocked tape .
According to a second aspect of the invention, there is provided flocked rubber profile produced according to a procedure in accordance with any of claims 1 to 8 , characterized in that it comprises a rubber profile tightly bonded to a flocked tape which has a base that comprises an olefinic element chemically compatible with a polymer present in the rubber profile . According to a third aspect of the invention, there is provided a flocked sealing profile comprising flocked tape which has a desired width of flock and a base, intended to come into contact with the surface of the profile , characterised in that the base comprises an olefinic compound chemically compatible with a polymer present in the rubber profile, and in that the rubber profile and the flocked tape are contact bonded together by applying heat .
Obj ects of the embodiment of the present invention to be described in detail below are to achieve a flocking system for rubber profiles which requires an installation occupying the least possible space , has a better yield and whereby a flopk of bette.r quality is produced than using the procedures currently known for this type of profiles .
To do this , the embodiment provides for the use of a flocked tape which has previously been cut to the required width and it is brought into contact with the rubber profile at a suitable temperature, producing a tight bond between the rubber and the flocked tape .
Rubbers are heat-stable materials , which means that to achieve the bond by heating and contact provided by the embodiment , the flocked tape, which may be of the type commercially available, should include in its base, intended to make contact with the profile surface, an olefinic element compatible with one of the polymers which form part of the rubber formulation .
The tests and experiments performed by the inventors show that the presence of said olefinic element on the base of the tape, surprisingly, enables a tight , long-lasting heat bond with the rubber profile, despite the known fact that rubbers are heat-stable materials , i . e . they do not flow as the temperature increases . The heating temperature of the tape should preferably be close to the melting point of the selected olefinic component . '
Preferably, the olefinic component will be short-chain . More preferably, this will be ethylene .
Depending on the composition and structure of the rubber, the olefinic component present in the base of the tape , may be added as an additive thereto .
The flocked tape , being a normal product on the market , and previously cut to the desired width, may come from a reel during the flocking process .
The present invention also provides a flocked profile obtained using the flocking procedure . This rubber profile may have tightly bonded to its surface a flocked tape of the type commercially available , formed by a base and a flock, in which there is no intermediate adhesive between both components .
The embodiment has numerous advantages over those previously known, amongst which can be cited : - : Reduced investment in the flocking line . The space necessary to apply the flocked tape is approximately two metres , much less than with the known procedure . Constant quality of the flock throughout the profile .
Increase in the flocking speed, as it is not limited by the cross-linking time . As a consequence , the rate of extrusion of the profile can be increased. - Increase in yield, as it eliminates the loss of flock which escapes the adhesive . • Reduction in the so-called quality costs . In the case of defective flock, it is not necessary to throw away the profile, but just dispose of the tape .
For better understanding of the invention, an embodiment will now be described by way of example only with reference to the accompanying drawings in which
Figure 1 is a diagram which represents a process of manufacturing a flocked rubber profile which uses the flocking procedure according to the present invention .
Figure 2 is a perspective view of a flocked tape , in rolled up position, and already cut to be applied to a profile, with a detail of its flocked side .
Figure 3 is another perspective view of the tape of figure 2 in which a detail of the side intended to make contact with the surface of the rubber profile is shown. Figure 4 is a cross-section view of a profile according to the present invention in which the bonding process between the profile and the flocked tape has been represented diagrammatically.
Figure 5 is a front elevation view of a flocked rubber profile produced • according to the present invention .
Figure 6 is a cross-section view according to the plane VI-VI of figure 5.
Figure 7 is a rear elevation view of the profile of figure 5.
Figure 8 is a detail of the flocked area of the section of figure 6 , which shows in additional detail the bond between the rubber profile and the flocked profile .
Figure 1 shows the manufacturing process of a flocked EPDM profile 1 , in which the procedure is used according to the present invention . As can be observed in the drawing, the manufacturing of a rubber profile comprises , typically, the step of extrusion of the profile 2 , which precedes a vulcanization phase by microwaves or UHF vulcanization, indicated in the drawing by the reference numeral 3 , and a subsequent vulcanization phase by adding heat in a gas channel , indicated in the drawing by the reference numeral 4. At the exit of this last vulcanization phase , the profile 1 passes to the flocking area 5.
Characteristically for the present embodiment , within the flocking area 5 both the profile 1 and the flocked tape 6 pass to an area 7 where they are heated and then to an area 8 where they come into contact with one another, making the bond, and producing the flocked profile .
In the example shown, the flocked tape 6 has been previously cut to the desired width (which, typically for the application shown in the example, ranges from 5 to 30 mm) , and enters the flocking area 5 from a motorized unwinder 9 which unwinds a spool of tape 6 so that the linear advance speed of the tape 6 is equal to the extrusion rate of the profile .
The flocked tape 6 (see figures 2 and 3 ) is of the type available commercially . The tape comprises a flocked side 10 on a base 11 intended to come into contact with the surface of the profile . The base 11 comprises an olefinic compound which is chemically compatible with one of the EPDM polymers of the profile, for example ethylene, which guarantees that , if we heat the surface 11 of the tape 6 to a temperature close to the melting point of the olefinic compound and we heat the surface of the EPDM profile appropriately, they bond by simple contact , as can be observed diagrammaticalIy in figure 4 , in which the contact has been represented by arrows A, and the temperature by wavy lines B . That is, there is no intermediate adhesive between the base 11 and the profile 1 ; they are bonded directly to one another .
The heating temperature of the surface of the EPDM profile 1 should be in the order of the melting temperature of the polymer which will achieve the bond with the olefinic component of the base 11 of the tape , but in any case lower than the degradation temperature of the EPDM .
Depending on the composition and structure of the profile material , the present embodiment provides for the addition, as an additive to the EPDM composition, of an olefinic compound compatible with the present flocked tape 6 to favour the bond between profile and tape .
Figures 5 to 8 show an EPDM profile intended to serve as a seal in a window 1 with a sliding pane , produced using the procedure of figure 1. In the detail of figure 8 it can be observed that the rubber profile 1 is characterized in that it has a rubber profile joined to a flocked tape 6 comprising a base 11 which has a flocked side 10 , the tape 6 being tightl y bonded to the profile without the presence of an adhesive between both components . As a consequence of this composition, it can be observed that the hairs of the flocked surface 10 are essentially perpendicular to the surface throughout .

Claims

1. Procedure for the flocking of rubber profiles (1) , characterized in that it comprises the steps of providing a flocked tape (6) which has a desired width of flock (10) and whose base (11) , intended to come into contact with the surface of the profile (1) , comprises an olefinic compound chemically compatible with a polymer present in the rubber profile (1) ; heating of the rubber profile (1) and the flocked tape (6) ; and forming a contact bond between the rubber profile (1) and the flocked tape (6) .
2. Procedure according to the claim 1 , characterized in that it comprises the step of cutting the flocked tape ( 6) to the desired, width .
3. Procedure according to claims 1 or 2 , characterized in that it comprises the step of unwinding the flocked tape (6) at a linear speed substantially equal to the rate of production of the rubber profile (1) .
4. Procedure according to any of claims 1 to 3 , characterized in that the tape (6) is heated at a temperature close to the melting point of said olefinic compound.
5. Procedure according to any of claims 1 to 4 , characterized in that the olefinic compound is a short chain compound.
6. Procedure according to claim 5 , characterized in that the olefinic compound is ethylene .
7. Procedure according to any of claims 1 to 6 , characterized in that the rubber profile comprises EPDM.
8. Procedure according to any of claims 1 to 7 , characterized by the addition, as an additive in the composition of the rubber profile (6) , of an olefinic compound chemically compatible with that of the flocked tape (6) .
9. Flocked rubber profile produced according to a procedure in accordance with any of claims 1 to 8 , characterized in that it comprises a rubber profile (1) tightly bonded to a flocked tape (6) which has a base (11) that comprises an olefinic element chemically compatible with a polymer present in the rubber profile (1) .
10. A flocked sealing profile (1) comprising flocked tape (6) which has a desired width of flock (10) and a base (11) , intended to come into contact with the surface of the profile (1) , characterised in that the base (11) comprises an olefinic compound chemically compatible with a polymer present in the rubber profile (1) , and in that the rubber profile (1) and the flocked tape (6) are contact bonded together by applying heat .
11. The profile according to claim 10 , characterized in that the tape (6) is heated at a temperature close to the melting point of said olefinic compound .
12. The profile according to claims 10 or 11 , characterized in that the olefinic compound is a short chain compound.
13. The profile according to claim 12 , characterized in that the olefinic compound is ethylene .
14. The profile according to any of claims 10 to 13 , characterized in that the rubber profile comprises EPDM.
15. The profile according to any of claims 10 to 14 , characterized by the addition, as an additive in the composition of the rubber profile (6) , of an olefinic compound chemically compatible with that of the flocked tape (6) .
PCT/IB2006/000267 2005-02-11 2006-01-30 Procedure for flocking profiles and flocked profile produced thereby WO2006085206A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06710358A EP1846220A1 (en) 2005-02-11 2006-01-30 Procedure for flocking profiles and flocked profile produced thereby

Applications Claiming Priority (2)

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ES200500303A ES2237341B1 (en) 2005-02-11 2005-02-11 PROCEDURE FOR FLOCKING PROFILES AND FLOCKING PROFILE OBTAINED THROUGH THE SAME.
ES200500303 2005-02-11

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WO2021103175A1 (en) * 2019-11-28 2021-06-03 陈正林 On-line hot laminating process for automobile sealing strip flocking belt

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ES2245615B1 (en) * 2005-08-03 2007-03-01 Industrias Tapla, S.L. Flocked band comprises a polyolefin film substrate onto which fibres are attached using a resin layer

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ES2237341B1 (en) 2007-03-01
EP1846220A1 (en) 2007-10-24
ES2237341A1 (en) 2005-07-16

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