WO1999058403A1 - Procede pour emballer des colles a fusion - Google Patents

Procede pour emballer des colles a fusion Download PDF

Info

Publication number
WO1999058403A1
WO1999058403A1 PCT/EP1999/003001 EP9903001W WO9958403A1 WO 1999058403 A1 WO1999058403 A1 WO 1999058403A1 EP 9903001 W EP9903001 W EP 9903001W WO 9958403 A1 WO9958403 A1 WO 9958403A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
melt adhesive
adhesive
hot melt
portions
Prior art date
Application number
PCT/EP1999/003001
Other languages
German (de)
English (en)
Inventor
Jan-Dirk Auris
Original Assignee
Henkel Kommanditgesellschaft Auf Aktien
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 Henkel Kommanditgesellschaft Auf Aktien filed Critical Henkel Kommanditgesellschaft Auf Aktien
Priority to AU41374/99A priority Critical patent/AU4137499A/en
Priority to BR9911777-0A priority patent/BR9911777A/pt
Priority to EP99924866A priority patent/EP1077876A1/fr
Publication of WO1999058403A1 publication Critical patent/WO1999058403A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B63/00—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged
    • B65B63/08—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for heating or cooling articles or materials to facilitate packaging

Definitions

  • the invention relates to a method for packaging hot melt adhesive, in particular pressure sensitive hot melt adhesive, in a film which is suitable for melting with the hot melt adhesive at the same time and has no surface tack in the range of normal storage temperatures, in particular at temperatures up to 50 ° C, a predetermined one Fills portion of the melted hot melt adhesive, interrupts the filling process so that a film area following the portion remains adhesive-free and repeats the filling process, and the film is sealed in the adhesive-free area.
  • hot melt adhesive in particular pressure sensitive hot melt adhesive
  • Hot melt adhesives are solvent-free adhesives that can wet material surfaces well in the heat and in the liquid state and adhere firmly to them after cooling and solidification. They usually consist of a mixture of substances that form the adhesive, the cohesive and the additive component. During manufacture, the components are melted together and then assembled. The so-called pressure sensitive hot-melt adhesives cause particular difficulties in packaging. H. Hot melt adhesives with permanent stickiness, which are still sticky even at room temperature.
  • a method of the type mentioned above is known from German published patent application DE 24 13 575 A1.
  • the movement of the hose is first stopped and the hose is welded by a transverse double seam and thus closed.
  • the forward movement of the hose is stopped again, on the one hand air is pressed into the hose to compensate for the water pressure acting on the hose and on the other hand a certain amount of hot melt adhesive is introduced via a lance until it is perpendicular hanging hose is filled to a level that is below the water level.
  • the tube is then welded again by means of a transverse double-crimped seam and thus closed.
  • an overlying double pinch seam is attached by welding, which forms the lower end of the following portion.
  • the hose then continues to run through the water bath, in which the hot-melt adhesive cools, and is finally separated into the individual portions by a cutter.
  • the hot melt adhesive which has been separated into individual portions, is stored at a temperature above the softening temperature, the weld seams protect the adhesive from flowing out of the film.
  • Such high storage temperatures occur again and again in practice, e.g. B. in hot summers on trucks or other uncooled storage, especially in subtropical or tropical areas. In these cases, temperatures up to 50 ° C and above are reached, so that the hot melt adhesive softens. Sealing the film by gluing with the hot melt adhesive is therefore not sufficient. Because if in such a case on the film z. B. is exerted by overlying packaging units, the adhesive opens and the adhesive flows out of the packaging, so that it is no longer usable on the one hand and on the other hand has a considerable cleaning effort.
  • a disadvantage in the known method mentioned above is the loss of time, which arises on the one hand from the frequent interruptions in the forward movement of the hose and on the other hand due to the interruption of the supply of adhesive during the welding, and the filling speed which is limited in this way.
  • a uniform, uninterrupted movement of the film or the film tube is not possible with the system shown in DE 24 13 575 A1.
  • the period of time required for welding cannot be shortened easily either, since a secure and complete closure requires a minimum time due to the thermal processes taking place during welding.
  • a secure and complete closure is necessary so that the still liquid hot melt adhesive of the portion just filled from WO 99/58403 " ⁇ ' PCT / EP99 / 03001
  • Another disadvantage of the known method is the risk that the hot melt adhesive welded into the film contains air bubbles or air gaps.
  • the air can be present within the adhesive mass or at the ends of the adhesive portions.
  • the invention is therefore based on the object of achieving a considerably higher filling speed in the process of the type mentioned at the outset, the portions covered with film being protected against outflow at elevated storage temperatures.
  • the inclusion of air in the film packaging should be excluded.
  • the film is welded in the adhesive-free areas and also cut through there if necessary.
  • an increased filling speed can be achieved, because the welding only needs later, e.g. B. to be made only after cooling of the film tube filled with hot melt adhesive.
  • the filling of the hot-melt adhesive into the film tube or directly onto the film, as will be explained in more detail below, is only interrupted briefly in order to create the adhesive-free zone. There is nothing to increase the filling speed due to shorter cycle times WO 99/58403 " * " PCT / EP99 / 03001
  • the hot melt adhesive welded into the film contains air bubbles or air gaps, because any air that is present is squeezed out by the squeezing, the hot melt adhesive being simultaneously compressed.
  • the method according to the invention is suitable for the packaging of practically any type of hot-melt adhesive composition. It is particularly advantageous for hot melt adhesives with serious handling problems, e.g. B. for the above-mentioned, even at room temperature still tacky hot melt adhesives.
  • the packaging process of the invention can be applied to hot melt adhesives made from polymers and copolymers of synthetic resins, rubbers, polyethylene, polypropylene, polyurethane, acrylic, vinyl acetate, ethylene vinyl acetate and polyvinyl alcohol.
  • hot melt adhesives made from the following components:
  • Elastic polymers such as block copolymers, e.g. B. styrene-butadiene, styrene-butadiene-styrene, styrene-isoprene-styrene, styrene-ethylene-butylene-styrene, styrene-ethylene-propylene-styrene;
  • ethylene vinyl acetate polymers other ethylene esters and copolymers, e.g. B. ethylene methacrylate, ethylene n-butyl acrylate and ethylene acrylic acid;
  • polyolefins such as polyethylene and polypropylene
  • Aldehydes containing resins such as phenol aldehyde, urea aldehyde, melamine aldehyde and the like.
  • Components for strengthening the adhesion may also be present.
  • Liquid polybutene or polypropylene petroleum waxes such as paraffin and microcrystalline waxes, semi-liquid polyethylene, hydrogenated animal, fish and vegetable fats, mineral oil and synthetic waxes and hydrocarbon oils may be mentioned as examples of diluents.
  • the given portions are filled onto a band-shaped film and the band-shaped film containing the hot-melt adhesive portions is formed into a film tube, in particular by welding the longitudinal edges of the band-shaped film together.
  • Foil tube moves at a constant speed, but the filling of the hot melt adhesive is carried out discontinuously and intermittently.
  • a further improvement in the economy of the method according to the invention is achieved if the temperature of the melted hot-melt adhesive when filling the film or into the film tube is below the softening temperature of the film or the film tube.
  • subsequent cooling of the film or the hose with water is not necessary. It is also advantageous that, in this case, no measures are necessary to keep the hose area below the water surface exposed to the hydrostatic pressure.
  • the adhesive-free area should only be as long as is technically necessary for welding and cutting. In practice, it has proven to be advantageous if the adhesive-free area between the individual portions has a length of 2 to 20 mm, in particular of about 10 mm.
  • the squeezed area has a length of 2 to 20 mm, in particular of about 10 mm, at the ends of the individual portions.
  • the squeezing is carried out by means of two parallel and opposite rollers which are mutually variable in their spacing and between which the film tube is guided.
  • a quick work without hot melt dripping into the intended adhesive-free area and without stringing occurs if a nozzle is used to fill the portions, which can be closed by a valve, in particular a needle valve, at the nozzle outlet and through which the Hot melt adhesive can preferably be pressed out by means of compressed air.
  • the selection of the material for the film tubes used is based on the requirements that the film can be welded without problems and that the film can be mixed with the hot melt adhesive in the melting basin of the user without leaving any residue and the properties of the hot melt adhesive after the mixing are not negatively Way influenced.
  • Suitable film tubes include ethylene-based polymers such as ethylene / vinyl acetate, ethylene acrylate, ethylene methacrylate, ethylene methyl acrylate, ethylene methyl methacrylate, HD and LD polyethylene, polyethylene blends and chemically modified polyethylenes, copolymers of ethylene and mono- or di-unsaturated C 1- 6-monomers, polyamides, polybutadiene, polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate, etc .; thermoplastic polycarbonates, atactic polyalphaolefins including atactic polypropylene, thermoplastic polyacryiamides, polyacrylonitrile, copolymers of acrylonitrile and other monomers such as butadiene, styrene, etc., polymethylpentene, polyphenylene sulfide, aromatic polyurethanes,
  • ethylene-based polymers such as ethylene / vinyl acetate, ethylene acrylate,
  • Styrene acrylonitrile, acrylonitrile butadiene styrene, styrene butadiene rubber, acrylonitrile butadiene styrene elastomers.
  • LD polyethylene particularly preferred as the material for the film are LD polyethylene, where "LD” stands for “low density”, or polyethylene vinyl acetate, which contains up to 10% by weight of vinyl acetate.
  • the mass of the film is 0.2 to 1.0% by weight of the hotmelt adhesive. It is also proposed that the film have a thickness of 2 to 150 ⁇ m, in particular 10 to 100 ⁇ m.
  • FIG. 1 shows a schematic representation of the filling area of a plant operating according to a first exemplary embodiment of the method according to the invention
  • Figure 2 shows a section of part of the filled according to the invention
  • FIG. 3 shows a schematic illustration of the filling area of a plant operating according to a second exemplary embodiment of the method according to the invention.
  • hotmelt adhesive 1 is filled at 60 to 130 ° C.
  • the example relates in particular to filling temperatures between 100 and 130 ° C.
  • the liquid adhesive is fed to the film tube 3 'via a heated nozzle 2 which can be closed with a needle valve (not shown).
  • the film tube 3 ' runs continuously and without interruption at a uniform speed.
  • the hot melt adhesive is filled into the hose 3 under pressure by means of compressed air in order to achieve a high filling speed.
  • the film consists of low density polyethylene (LD-PE) and is 30 ⁇ m thick.
  • the nozzle 2 used is an application head of the type H200 ZC or H200 MC (product from Nordson Corp., USA) which is usually used to apply hot-melt adhesives to a substrate to be bonded, with a perforated nozzle and a needle valve which can be actuated by means of compressed air .
  • the film tube 3 ' is held by a guide basket 4 in the intended shape and in particular on the planned diameter, which here is 80 mm. In the area of the nozzle 2, a nozzle ring 5 is attached.
  • This is designed as an annular distributor provided with nozzles, from which water is sprayed against the film tube 3 'in such a way that a closed water film flows down the film.
  • Cooled drive and pinch rollers 6 transport the film and close the individual sausage-shaped portions by squeezing at both ends, so that pinch areas 7 are formed there (FIG. 2).
  • An adhesive-free zone 8 is arranged between the squeezing areas 7 of successive portions, as can be seen most clearly from FIG.
  • a cooling water tank 9 can be provided for further cooling of the packaged portions.
  • cooling can be dispensed with if the temperature of the melted hot-melt adhesive when the film tube is filled is below the softening temperature of the film tube.
  • the temperature of the hot melt adhesive can be around 80 ° C. and polyethylene can be used as the film tube so that cooling of the drive and pinch rollers 6 and subsequent cooling of the tube with water is not necessary.
  • the adhesive-free area 8 is welded at points 10 and 11 by a transverse seam or a double transverse seam, and at the same time the tube 3' is cut at point 12 with a knife, so that individual, securely welded portions of hot melt adhesive packed in film are obtained.
  • the method according to the invention is carried out with a system which is shown schematically in part in FIG. 3.
  • the details and data not expressly mentioned in this example correspond to those of the first example according to FIGS. 1 and 2.
  • a band-shaped film 3 is unwound evenly from a storage drum and moves smoothly and without interruptions in FIG. 3 to the right.
  • An application head 13 as is known per se for the automatic application of hot melt adhesive to workpieces, has a slot nozzle 2 with a maximum gap width of 0.3 mm, the nozzle being able to be opened and closed by a nozzle valve which can be actuated by compressed air.
  • Figure 3 is only WO 99/58403 "1 ° " PCT / EP99 / 03001
  • a single application head 13 is drawn.
  • 600 g of hot melt adhesive are applied to the film in the form of portions 1 with the application head 13, the slot nozzle 2 being closed briefly after the application of each portion, so that 1 adhesive-free zones 8 are formed on the film 3 between the portions of hot melt adhesive .
  • the temperature of the melted adhesive is approximately 80 ° C. and thus below the softening temperature of the polyethylene film 3 used. Cooling is therefore not necessary and also not provided.
  • deflection plates 14 or corresponding deflection rollers which form a tube from the band-shaped film by bringing the opposite edges of the film 3 together and overlapping them.
  • the longitudinal seam formed in this way is welded in a manner known per se. This method step and the subsequent steps are not shown in FIG. 3.
  • a squeezing station follows, which works similarly to the system according to FIG. 1.
  • the movement of the rollers provided for this purpose is adjusted so that between the individual portions of adhesive melt adhesive 1 there is in each case an adhesive-free zone 8 with the desired length.
  • a transverse weld seam 10, 11 is applied to the ends of each portion 1, specifically in the respective adhesive-free area 8, and the portions 1 at the same time, likewise in the area of the adhesive-free zone 8 and between the adjacent cross-weld seams 10, 11 (see Figure 2), separated from each other with a knife.
  • the hotmelt adhesive 1 can be cooled before welding and cutting or afterwards.
  • Adhesive melt adhesive serving as

Abstract

L'invention concerne un procédé permettant d'emballer des colles à fusion dans un film (3) apte à fondre simultanément avec la colle à fusion et ne présentant pas d'adhérence superficielle dans la plage des températures de stockage habituelles, notamment à des températures allant jusqu'à 50 °C. Selon ce procédé, on place dans le film une dose prédéfinie de la colle à fusion (1) fondue, on interrompt le processus de remplissage, de manière qu'une zone du film (8) demeure exempte de colle sur la portion et on reprend le processus de remplissage. On soude le film (3) dans la zone (8) exempte de colle. Selon l'invention, on produit un film tubulaire (3') rempli de portions de colle à fusion. Des zones (8) prévues entre les portions sont exemptes de colle sur l'ensemble de la largeur tubulaire. On ferme le film tubulaire (3') par écrasement de la colle à fusion aux extrémités des portions, puis on le fait éventuellement refroidir. Après l'opération d'écrasement, le film (3) est soudé dans les zones (8) exemptes de colle. On parvient à une vitesse de remplissage particulièrement élevée et les portions entourées par le film (3) sont à l'abri des risques d'écoulement à températures de stockage élevées. Tout risque d'inclusion d'air dans l'emballage pelliculaire est également exclu.
PCT/EP1999/003001 1998-05-13 1999-05-04 Procede pour emballer des colles a fusion WO1999058403A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU41374/99A AU4137499A (en) 1998-05-13 1999-05-04 Method for packaging hot-melt adhesives
BR9911777-0A BR9911777A (pt) 1998-05-13 1999-05-04 Processo para embalar adesivo de fusão
EP99924866A EP1077876A1 (fr) 1998-05-13 1999-05-04 Procede pour emballer des colles a fusion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19821399 1998-05-13
DE19821399.9 1998-05-13

Publications (1)

Publication Number Publication Date
WO1999058403A1 true WO1999058403A1 (fr) 1999-11-18

Family

ID=7867616

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/003001 WO1999058403A1 (fr) 1998-05-13 1999-05-04 Procede pour emballer des colles a fusion

Country Status (6)

Country Link
EP (1) EP1077876A1 (fr)
AR (1) AR019290A1 (fr)
AU (1) AU4137499A (fr)
BR (1) BR9911777A (fr)
DE (1) DE19913034A1 (fr)
WO (1) WO1999058403A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130118128A1 (en) * 2011-11-15 2013-05-16 Andreas LUECKE Composite film and packaging produced therefrom
CN113508159A (zh) * 2018-11-13 2021-10-15 德莎欧洲股份公司 经包装的粘弹性聚合物物质

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7137235B2 (en) * 2004-10-12 2006-11-21 Bostik Sa Device and method for packaging in block form a sheathed hot-melt adhesive product
DE102010003896A1 (de) 2010-04-13 2011-10-13 Heimbach Gmbh & Co. Kg Klebstoffkonfektionierung
DE102018219353A1 (de) * 2018-11-13 2020-05-14 Tesa Se Verpackte viskoelastische Polymermasse

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2413575A1 (de) 1974-03-21 1975-09-25 Stahl Geb Quabeck Margarete Verfahren und vorrichtung zum verpacken von schmelzbarem oder fluessigem material, insbesondere von geschmolzenem bitumen, in flexiblen, gegen wasser und gegen das geschmolzene material widerstandsfaehigen behaeltern
EP0649718A1 (fr) * 1990-08-01 1995-04-26 H.B. FULLER LICENSING & FINANCING, INC. Procédé pour le conditionnement d'un adhésif et l'article conditionné correspondant
EP0661209A1 (fr) * 1993-12-20 1995-07-05 Orihiro Co., Ltd. Machine de remplissage et d'emballage du type vertical
EP0699586A1 (fr) * 1994-08-12 1996-03-06 National Starch and Chemical Investment Holding Corporation Technique de production pour des blocs d'adhésifs thermofusibles
WO1998008738A1 (fr) * 1996-08-26 1998-03-05 Swedish Match Sverige Ab Dispositif d'emballage de tabac humidifie finement hache

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2413575A1 (de) 1974-03-21 1975-09-25 Stahl Geb Quabeck Margarete Verfahren und vorrichtung zum verpacken von schmelzbarem oder fluessigem material, insbesondere von geschmolzenem bitumen, in flexiblen, gegen wasser und gegen das geschmolzene material widerstandsfaehigen behaeltern
EP0649718A1 (fr) * 1990-08-01 1995-04-26 H.B. FULLER LICENSING & FINANCING, INC. Procédé pour le conditionnement d'un adhésif et l'article conditionné correspondant
EP0661209A1 (fr) * 1993-12-20 1995-07-05 Orihiro Co., Ltd. Machine de remplissage et d'emballage du type vertical
EP0699586A1 (fr) * 1994-08-12 1996-03-06 National Starch and Chemical Investment Holding Corporation Technique de production pour des blocs d'adhésifs thermofusibles
WO1998008738A1 (fr) * 1996-08-26 1998-03-05 Swedish Match Sverige Ab Dispositif d'emballage de tabac humidifie finement hache

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130118128A1 (en) * 2011-11-15 2013-05-16 Andreas LUECKE Composite film and packaging produced therefrom
CN113508159A (zh) * 2018-11-13 2021-10-15 德莎欧洲股份公司 经包装的粘弹性聚合物物质

Also Published As

Publication number Publication date
EP1077876A1 (fr) 2001-02-28
AU4137499A (en) 1999-11-29
AR019290A1 (es) 2002-02-13
DE19913034A1 (de) 1999-11-18
BR9911777A (pt) 2001-02-06

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