EP0189092B1 - Procédé de fabrication de sacs en matière thermoplastique - Google Patents

Procédé de fabrication de sacs en matière thermoplastique Download PDF

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Publication number
EP0189092B1
EP0189092B1 EP86100412A EP86100412A EP0189092B1 EP 0189092 B1 EP0189092 B1 EP 0189092B1 EP 86100412 A EP86100412 A EP 86100412A EP 86100412 A EP86100412 A EP 86100412A EP 0189092 B1 EP0189092 B1 EP 0189092B1
Authority
EP
European Patent Office
Prior art keywords
web
tubular
pieces
webs
sections
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86100412A
Other languages
German (de)
English (en)
Other versions
EP0189092A2 (fr
EP0189092A3 (en
Inventor
Fritz Ing. Grad. Achelpohl
Hermann Oelrich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Priority to AT86100412T priority Critical patent/ATE58334T1/de
Publication of EP0189092A2 publication Critical patent/EP0189092A2/fr
Publication of EP0189092A3 publication Critical patent/EP0189092A3/de
Application granted granted Critical
Publication of EP0189092B1 publication Critical patent/EP0189092B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/62—Uniting opposed surfaces or edges; Taping by adhesives
    • B31B70/628—Applying glue on moving webs to form tubular webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2170/00—Construction of flexible containers
    • B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S493/00—Manufacturing container or tube from paper; or other manufacturing from a sheet or web
    • Y10S493/916—Pliable container
    • Y10S493/933—Pliable container having multilayer wall

Definitions

  • the invention relates to a method for producing sacks from thermoplastic, in which a tubular web is formed from a plastic film web by wrapping in the side parts and gluing their overlapping edge regions by a longitudinal seam, and hose sections are separated from this tubular web, which are welded with bottom weld seams and after Filling with head welding seams.
  • a method for producing sacks from thermoplastic in which a tubular web is formed from a plastic film web by wrapping in the side parts and gluing their overlapping edge regions by a longitudinal seam, and hose sections are separated from this tubular web, which are welded with bottom weld seams and after Filling with head welding seams.
  • the bag tube pieces can be provided with side gussets before the transverse bottom weld seams are attached. If the bags are made of plastic films, there is a risk of damage during loading, transportation and storage because the plastic films forming the bag walls are very susceptible to tearing and the bags are usually subjected to a rough treatment. Damage caused when the sacks are handled can result in filling losses of up to 50%.
  • Sacks are also known which consist of tubular pieces made of a fabric made of stretched plastic tapes. Such bags have a high strength, sa that they are not damaged even with rough treatment and with impacts with pointed objects. Sacks made from plastic tapes have the disadvantage that they are difficult to weld, so that the manufacture of the top and bottom seams presents considerable difficulties.
  • this object is achieved in that web pieces made of a fabric made of stretched plastic tapes, which are shorter than the distance between the later bottom and head weld seams on the flat-lying sacks, are introduced with a mutual distance between two converging plastic film webs, the area of the later bottom - And head welding seams bridged that the webs and the fabric web pieces are laterally offset and the exposed edge strips of the webs and fabric web pieces are provided with hot-melt adhesive coatings, so that during subsequent tube formation they jerk with their opposite edge strips that overlap the hot-melt adhesive coatings, and that from the The tube pieces are cut off approximately in the middle between the fabric sheet pieces and these are provided with the transverse floor weld seams which only capture the plastic tube sheet pieces.
  • the sacks produced by the method according to the invention thus have three-layer walls which are formed by the plastic webs which lie on the inside and outside and which enclose the reinforcing fabric web pieces between them.
  • the composite film forming the sack walls has a high level of tightness and, moreover, also a high level of strength, because the fabric web pieces are largely insensitive to injuries and are insensitive to tears. Since the fabric web pieces lie outside the bottom and head weld seams, these can be easily attached.
  • the main loads on the bags arise in the region of the side walls, which are reinforced by the fabric sheet pieces, so that there is no significant weakening in that the fabric sheet pieces end in front of the bottom and head transverse weld seams which are only passed through the sheet pieces.
  • the bags produced by the process according to the invention withstand high loads after they have been filled and after the head welds have been made. They will not be damaged even if they are handled several times during transport and storage. These sacks are not only insensitive to tears, but also to stitches, because the ribbon fabric inserts have the streaking that they contract again after the penetration of pointed objects.
  • one of these is provided with a plurality of strips of hot-melt adhesive which are parallel and spaced apart.
  • the tape fabric inserts are connected to the relevant film web by means of these hot-melt adhesive strips.
  • the hot-melt adhesives bond the foils surrounding the fabric web pieces to one another, so that these, too, are fixed sufficiently firmly to one another.
  • the length of the fabric web pieces corresponds to the height of the side walls of the filled sacks.
  • This configuration is particularly expedient in the case of large bags with a capacity of 1 to 2 tons, since in these the fabric web pieces form, as it were, the side walls stiffening belly bandages.
  • the bottom and top surfaces provided with the transverse weld seams form stand surfaces with less load in such bags.
  • the double-layer tubular web with the fabric web pieces produced by the method according to the invention can be wound up into transport rolls, from which the individual bag hose pieces are separated before filling.
  • flexible material strips for example made of plastic film, can be placed on the edge regions of the tubular web before winding, which compensate for the height of the seams formed by the overlaps.
  • the webs 3 and 4 are continuously drawn off from the film rolls 1 and 2. Between these two webs 3 and 4, tissue pieces 5 are introduced at a distance from one another, which are cut off in cycles from a web 7 drawn off from a roll 6. 2 shows, the individual layers 3, 4 and 5 are offset from one another. Continuous strips 9 of a hot-melt adhesive are applied via a glue application unit 8, by means of which, on the one hand, the fabric pieces 5 are fixed on the web 4. On the other hand, the upper web 3 is also connected to the lower web in the area Y in which the fabric pieces do not lie against one another. The tube which can be seen in cross section in FIG. 3 is then formed from the three-layer flat web shown in FIG. 2 via a folding device 10. The glue strips 11 required for connection (FIG.
  • hose 13 is then advanced further by the preferred rollers 14 and, if necessary, divided into individual hose sections by a cutting device 15 or wound up into a roll 16 after the cutting device 15 has been shut down.
  • a switch 17 is provided behind the cutting device 15, which is constructed in a known manner.
  • Pieces of hose according to FIG. 4 are then separated from a hose provided with side gussets, the longitudinal seam not being shown in FIG. 4.
  • FIGS. 5 and 6 show that the middle layer 5 is shorter than the other two layers 3 and 4. If only one end of a hose section is shown here, the layer 5 is also set back at the other end compared to the other layers 3 and 4 .
  • the dimension for this offset is denoted by X.
  • a sack formed from such a piece of hose is shown in FIGS. 5 and 6. It can be seen in particular from FIG. 6 that the inner layer 5 made of fabric material is not covered by the welds 18 and 19.
  • the inner layer 5 is, as already indicated in FIG. 4, both ends by that dimension X shorter than the outer fabric layers 4.
  • a sack designed in this way can be welded very well on the one hand and withstands mechanical stresses exceptionally well on the other.
  • Such bags have a capacity of about 25 to 50 kilos. Artificial fertilizers are packaged in them, for example.
  • FIG. 7 shows a large sack with a capacity of 1 to 2 tons.
  • the fabric material 5 only extends over the filling height 20, whereas the material required for the bottom formation as well as the material required for closing the large sack is only formed from two webs 3 and 4 lying one on top of the other.
  • the distance Y denoted in FIG. 2 between two pieces of fabric 5 must therefore be so large during the production of the sack material that the two film webs 3 and 4 protrude a piece of fabric 5 on both ends to such an extent that there is sufficient material for the bottom formation (in FIG. 7) the bottom is already formed) and there is enough material left to add the filled large sack.

Landscapes

  • Making Paper Articles (AREA)
  • Bag Frames (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (6)

1. Procédé de fabrication de sacs en matière thermoplastique, dans lequel, à partir d'une feuille continue en matière plastique, l'on obtient par pliage des parties latérales et collage par soudure longitudinale de leurs bords se chevauchant une feuille continue en gaine, que l'on découpe en morceaux, qui sont pourvus de soudures de fond, puis après remplissage, de soudures de tête, caractérisé en ce qu'entre deux feuilles continues en matière plastique (3, 4) s'accolant, l'on introduit et ce à une distance réciproque recouvrant la zone des futures soudures de fond et de tête, des morceaux de bande continue en tissu de bandelettes étirées de matière plastique (5), qui sont plus court que la distance entre les futures soudures de fond et de tête (18,19) des sacs reposant à plat, en ce que les feuilles continues et les morceaux de bande continue en tissu sont accolés avec déport latéral et que les bordures latérales dégagées des feuilles continues et des morceaux de bande continue sont pourvues de couches de colle à fusion à chaud (11), de sorte que, lors de la formation d'une gaine, les bordures latérales respectivement opposées recouvrant les couches de colle à fusion à chaud sont collées et en ce que les morceaux de gaine sont découpés dans la bande continue de gaine sensiblement au milieu entre les morceaux de bande continue en tissu et son pourvus de soudures de fond transversales ne concernant que les morceaux de gaine continue en matière plastique.
2. Procédé selon la revendication 1, caractérisé en ce qu'avant l'accolement des feuilles continues en matière plastique, l'une de celles-ci est pourvue de plusieurs bandes distantes parallèles entre elles, de couches de colle à fusion à chaud (9).
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la longueur des morceaux de bande continue en tissu correspond à la hauteur des parois latérales des sacs remplis.
4. Procédé selon l'une des revendications 1, 3, caractérisé en ce que la bande continue en gaine à deux couches encadrant les morceaux de bande continue en tissu est enroulée sur un rouleau (16).
5. Procédé selon la revendication 4, caractérisé en ce qu'avant l'enroulement, sur les bords de la bande continue en gaine, des bandes de matériau flexibles sont posées, elles compensent la hauteur des assemblages formés par les recouvrements et les couches de colle à fusion à chaud.
6. Procédé selon l'une des revendications 1, 4, caractérisé en ce que des plis latéraux sont pratiqués dans la bande continue en gaine à deux couches encadrant les morceaux de bande continue en tissu.
EP86100412A 1985-01-23 1986-01-14 Procédé de fabrication de sacs en matière thermoplastique Expired - Lifetime EP0189092B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86100412T ATE58334T1 (de) 1985-01-23 1986-01-14 Verfahren zum herstellen von saecken aus thermoplastischem kunststoff.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853502151 DE3502151A1 (de) 1985-01-23 1985-01-23 Verfahren zum herstellen von saecken aus thermoplatischem kunststoff
DE3502151 1985-01-23

Publications (3)

Publication Number Publication Date
EP0189092A2 EP0189092A2 (fr) 1986-07-30
EP0189092A3 EP0189092A3 (en) 1989-01-04
EP0189092B1 true EP0189092B1 (fr) 1990-11-14

Family

ID=6260547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100412A Expired - Lifetime EP0189092B1 (fr) 1985-01-23 1986-01-14 Procédé de fabrication de sacs en matière thermoplastique

Country Status (5)

Country Link
US (1) US4726169A (fr)
EP (1) EP0189092B1 (fr)
AT (1) ATE58334T1 (fr)
CA (1) CA1264974A (fr)
DE (1) DE3502151A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116147544A (zh) * 2023-04-03 2023-05-23 广东汇发塑业科技有限公司 一种塑料薄膜表面平整度检测装置

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US4838982A (en) * 1987-06-26 1989-06-13 H.G. Weber & Co., Inc. Patch applicator vacuum cylinder for web material
US5001888A (en) * 1990-01-16 1991-03-26 Seagate Technology, Inc. Method of packaging and dispensing a mechanical part
DE19827987B4 (de) * 1998-06-24 2004-12-23 Lemo Maschinenbau Gmbh Trichterbeutel, insbesondere Topfpflanzentrichter aus thermoplastischer Kunststoffolie sowie Verfahren und Vorrichtung zum Herstellen eines solchen Trichterbeutels
US5993368A (en) * 1998-09-09 1999-11-30 Ohio Valley Bag And Burlap Company Apparatus for manufacturing shipping pouches
EP1122192A1 (fr) * 2000-02-02 2001-08-08 Tils, Peter Film tubulaire
ITBO20000483A1 (it) * 2000-08-03 2002-02-03 Guglielmo Martelli Procedimento per la realizzazione di un incarto per il confezionamento di prodotti alimentari e dispositivo per l' attuazione di tale proced
KR100448313B1 (ko) * 2001-08-23 2004-09-10 이미숙 투브라 포대 코팅방법
US7115086B1 (en) * 2004-08-20 2006-10-03 Automated Solutions, Llc Queue-based bag forming system and method
KR100702624B1 (ko) 2005-07-18 2007-04-03 (주)금풍 지대용지 및 지대
ATE431297T1 (de) * 2006-01-26 2009-05-15 Mondi Ag Mehrlagiger sack aus papier
US9845184B2 (en) 2012-02-13 2017-12-19 Polytex Fibers Corporation Easy open plastic bags
US9969529B2 (en) 2012-02-13 2018-05-15 Polytex Fibers Corporation Easy open plastic bags
US9669981B2 (en) 2012-02-13 2017-06-06 Polytex Fibers Corporation Easy open plastic bags
US11459157B2 (en) 2012-02-13 2022-10-04 Polytex Fibers Llc Woven plastic bags with features that reduce leakage, breakage and infestations
US11305927B2 (en) 2014-04-04 2022-04-19 Polytex Fibers Llc Easy open plastic bags
US10967999B2 (en) * 2014-12-02 2021-04-06 Nisshin Seifun Group Inc. Horizontal pillow packing apparatus and horizontal pillow packing method
CN107685479B (zh) * 2017-09-14 2019-06-21 广德美好包装科技有限公司 一种食品包装袋的印刷设备
US11345109B2 (en) * 2020-01-17 2022-05-31 Simple Container Solutions, Inc. Method for producing a recyclable bag

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Publication number Priority date Publication date Assignee Title
CN116147544A (zh) * 2023-04-03 2023-05-23 广东汇发塑业科技有限公司 一种塑料薄膜表面平整度检测装置
CN116147544B (zh) * 2023-04-03 2023-09-29 广东汇发塑业科技有限公司 一种塑料薄膜表面平整度检测装置

Also Published As

Publication number Publication date
EP0189092A2 (fr) 1986-07-30
EP0189092A3 (en) 1989-01-04
DE3502151A1 (de) 1986-07-24
CA1264974C (fr) 1990-01-30
ATE58334T1 (de) 1990-11-15
US4726169A (en) 1988-02-23
CA1264974A (fr) 1990-01-30

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