EP0011215A1 - Particules en matière plastique expansée servant de matériau d'emballage - Google Patents

Particules en matière plastique expansée servant de matériau d'emballage Download PDF

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Publication number
EP0011215A1
EP0011215A1 EP79104322A EP79104322A EP0011215A1 EP 0011215 A1 EP0011215 A1 EP 0011215A1 EP 79104322 A EP79104322 A EP 79104322A EP 79104322 A EP79104322 A EP 79104322A EP 0011215 A1 EP0011215 A1 EP 0011215A1
Authority
EP
European Patent Office
Prior art keywords
particles
particle
height
foamed plastic
foamed
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.)
Granted
Application number
EP79104322A
Other languages
German (de)
English (en)
Other versions
EP0011215B1 (fr
Inventor
Herbert Borchert
Walter Dr. Albert
Günter Kohaut
Ulrich Schulte
Bruno Rapp
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Hoechst AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6054091&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0011215(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hoechst AG filed Critical Hoechst AG
Priority to AT79104322T priority Critical patent/ATE6048T1/de
Publication of EP0011215A1 publication Critical patent/EP0011215A1/fr
Application granted granted Critical
Publication of EP0011215B1 publication Critical patent/EP0011215B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D81/09—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using flowable discrete elements of shock-absorbing material, e.g. pellets or popcorn
    • 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
    • Y10S206/00—Special receptacle or package
    • Y10S206/814—Space filler
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]

Definitions

  • the invention relates to a packaging material made of loose foamed plastic particles, which due to their shape and dimensions combine a very good flowability and at the same time a very good packing effect in terms of pressure and impact stress and in particular the so-called "wandering" of the packaged item through the Prevent packaging material.
  • Packing or filling material made of loose foamed plastic particles are known and are used in large quantities. Decisive for this are their freedom from dust, the resistance to moisture and mold, the abrasion resistance and their inert behavior. compared to the packaged goods with low weight.
  • Such packaging material particles are usually made available as compact, blowing agent-containing, non-foamed granules and are only foamed to the final shape by known methods in the packaging plant.
  • the effect of the foamed plastic particles as packaging material is based on the fact that they interlock or interlock with one another after the packaging goods have been embedded and thereby forming a kind of "resilient shell” around the good. This mutual interlocking is particularly important in order to prevent the packaged article from "wandering" through the packaging particles as a result of the transporter vibrations.
  • the packaging particles should also have good flow properties.
  • the light, foamed plastic particles are usually brought into storage containers in free fall from storage silos. To do this, the particles must be able to flow freely, since otherwise the particles become “bridged” in the storage bunker and the uniform outflow and thus the quantity of the particles is prevented or disturbed. In the case of fully automatic packaging systems in particular, this leads to sensitive faults.
  • Most of the particles thus shaped either have good free-flowing properties with moderate entanglement properties or very good interlocking properties with low pourability.
  • the object of the present invention was to produce foamable plastic particles which, after foaming, give a packaging material which has good flow properties and at the same time has good toothing properties.
  • star-shaped particles of very specific dimensional ratios in height, thickness and width meet the requirement for flowability and toothing ability particularly well.
  • incombustible propellants e.g. Trichlorofluoromethane
  • substances containing non-flammable gases e.g. Carbon dioxide, as a blowing agent, is also met in the particles according to the invention for the lowest fire risk.
  • a free-flowing packaging material made of foamed plastic particles which has a star shape with three legs lying in one plane and which are characterized in that they have a ratio of the particle thickness (D) to the particle height (H) of 1: 2.75 to 1: 3 , 3 and have a ratio of leg width (B) to particle height (H) of 1: 2.2 to 1: 2.5, the height (H) being 10 to 60 mm.
  • the area which is fully visible here corresponds to the position of the cut surface of the non-foamed particle and is perpendicular to the strand withdrawal direction (R).
  • the length of the particle in the strand withdrawal direction is referred to as the thickness (D).
  • the height of the foamed particles according to the invention is 10 to 60 mm, preferably 20 to 50 mm.
  • thermoplastics for the particles according to the invention are the thermoplastics usually used for foamed packaging material particles, preferably polystyrene.
  • the packaging material first of all by melting the plastic in an extrusion press, metering in a suitable blowing agent, preferably an incombustible, e.g. Trichlorofluoromethane or octafluorocyclobutane, under pressure in the plastic melt and squeezing out the blowing agent-containing melt through a corresponding mold opening and granulating a compact, blowing agent-containing, not foamed granulate.
  • a suitable blowing agent preferably an incombustible, e.g. Trichlorofluoromethane or octafluorocyclobutane
  • the strands emerging from the extruder are cooled rapidly, expediently by a water bath.
  • the cooled strands are then cut perpendicularly to the draw-off direction into particles of such a thickness that, after the foaming, the ratio of D to H given above is satisfied.
  • the expandable particles so formed can be heated to above their softening point, e.g. by steam to be foamed into the packaging material according to the invention. This foaming is usually only carried out at the consumer.
  • a plastic blowing agent can be added to the plastic before the extrusion process. Water vapor, carbonic acid or nitrogen is split off, mixed in.
  • an incombustible propellant has the advantage that the incombustible gas escaping upon contact with an ignition source acts as a protective gas. Even during storage, no explosive gas-air mixture can arise, e.g. if pentane is used as a blowing agent, and even if the foamed particles are exposed to fire, there may be a residual portion remaining in the cells. of the blowing agent one. develop a certain protective gas effect.
  • Table 1 below shows the superiority of the particles according to the invention in the flow and packing behavior compared to particles of other dimensional ratios.
  • a container with vertical wall surfaces and a square base with an edge length of 0.5 m was filled with packing material particles up to a height of 0.3 m.
  • the material was then pre-compacted by shaking for 1 second.
  • a steel cylinder with a diameter of 32 mm, a length of 100 mm and a weight of 0.64 kg was then placed in the center of the container as a test specimen so that its longitudinal axis was horizontal. The time it took for the steel cylinder to lie on the bottom of the container after the vibrating table was switched on was determined. Five trials were carried out in each of the trickle and pack tests. The values thus obtained are listed in Table 1, the “packing group 1” containing the particles according to the invention.
  • the "packing groups" 2, 3 and 4 show the values for particles of other dimensional ratios.
  • the table shows that the particles according to the invention are clearly superior to particles of other dimensions in the combination of flowability and packing behavior.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Buffer Packaging (AREA)
  • Wrappers (AREA)
  • Sealing Material Composition (AREA)
EP79104322A 1978-11-08 1979-11-06 Particules en matière plastique expansée servant de matériau d'emballage Expired EP0011215B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79104322T ATE6048T1 (de) 1978-11-08 1979-11-06 Als packmaterial dienende geschaeumte kunststoffteilchen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2848338 1978-11-08
DE19782848338 DE2848338A1 (de) 1978-11-08 1978-11-08 Freifliessendes packmaterial aus aufgeschaeumtem kunststoff

Publications (2)

Publication Number Publication Date
EP0011215A1 true EP0011215A1 (fr) 1980-05-28
EP0011215B1 EP0011215B1 (fr) 1984-02-01

Family

ID=6054091

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104322A Expired EP0011215B1 (fr) 1978-11-08 1979-11-06 Particules en matière plastique expansée servant de matériau d'emballage

Country Status (8)

Country Link
US (1) US4269895A (fr)
EP (1) EP0011215B1 (fr)
JP (1) JPS5571278A (fr)
AT (1) ATE6048T1 (fr)
CA (1) CA1122926A (fr)
DE (2) DE2848338A1 (fr)
DK (1) DK146295C (fr)
ES (1) ES485663A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3435440A1 (de) * 1983-12-10 1985-06-20 Hoechst Ag, 6230 Frankfurt Aufschaeumbares kunststoffgranulat und daraus hergestelltes packmaterial
EP0162306A2 (fr) * 1984-04-26 1985-11-27 The Dow Chemical Company Matière de garnissage
EP0189843A2 (fr) * 1985-01-30 1986-08-06 Shell Internationale Researchmaatschappij B.V. Granulé de matière plastique expansible et matériau d'emballage fabriqué avec ce granulé
WO2017202435A1 (fr) * 2016-05-24 2017-11-30 Quilts Of Denmark A/S Article de confort comprenant des éléments de remplissage en mousse

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4360339A (en) * 1981-02-02 1982-11-23 Combustion Engineering, Inc. Fluidized boiler
US4606965A (en) * 1984-04-27 1986-08-19 Harry Bussey Loose fill packing element
US5145742A (en) * 1990-08-03 1992-09-08 Eastman Kodak Company Polymer pellet configuration for solid-state polymerization
US5288740A (en) * 1992-10-23 1994-02-22 The Dow Chemical Company Process for making alkenyl aromatic foam packing bodies with carbon dioxide and/or ethane blowing agent systems
USD383066S (en) * 1995-05-22 1997-09-02 Free-Flow Packaging Corporation Loose fill packing material
US8672584B2 (en) 2011-05-13 2014-03-18 Rapac Drainage beads

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3188264A (en) * 1962-12-21 1965-06-08 Tektronix Inc Loose fill packing material
GB1262346A (en) * 1969-02-04 1972-02-02 Free Flow Packaging Corp Free flow packing material of low bulk density

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3481455A (en) * 1968-10-10 1969-12-02 Free Flow Packaging Corp Free-flowing packing material of low bulk density
US4042658A (en) * 1975-11-14 1977-08-16 Valcour Imprinted Papers, Inc. Method for making packaging particles and resulting product

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3188264A (en) * 1962-12-21 1965-06-08 Tektronix Inc Loose fill packing material
GB1262346A (en) * 1969-02-04 1972-02-02 Free Flow Packaging Corp Free flow packing material of low bulk density

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3435440A1 (de) * 1983-12-10 1985-06-20 Hoechst Ag, 6230 Frankfurt Aufschaeumbares kunststoffgranulat und daraus hergestelltes packmaterial
EP0144961A3 (en) * 1983-12-10 1985-12-18 Hoechst Aktiengesellschaft Foamable resin granules and packing material using them
EP0144961B1 (fr) * 1983-12-10 1991-09-04 Shell Internationale Researchmaatschappij B.V. Granules de résine moussable et son application comme matériau d'emballage
EP0162306A2 (fr) * 1984-04-26 1985-11-27 The Dow Chemical Company Matière de garnissage
EP0162306A3 (en) * 1984-04-26 1987-09-30 The Dow Chemical Company Improved dunnage material
EP0189843A2 (fr) * 1985-01-30 1986-08-06 Shell Internationale Researchmaatschappij B.V. Granulé de matière plastique expansible et matériau d'emballage fabriqué avec ce granulé
EP0189843A3 (en) * 1985-01-30 1988-01-13 Shell Internationale Research Maatschappij B.V. Granular foamable plastic material and packaging material made therefrom
WO2017202435A1 (fr) * 2016-05-24 2017-11-30 Quilts Of Denmark A/S Article de confort comprenant des éléments de remplissage en mousse

Also Published As

Publication number Publication date
DE2966625D1 (en) 1984-03-08
JPS5571278A (en) 1980-05-29
ATE6048T1 (de) 1984-02-15
DK146295C (da) 1984-02-06
DK146295B (da) 1983-08-29
DE2848338A1 (de) 1980-05-22
DK472079A (da) 1980-05-09
JPS6344636B2 (fr) 1988-09-06
US4269895A (en) 1981-05-26
EP0011215B1 (fr) 1984-02-01
ES485663A1 (es) 1980-05-16
CA1122926A (fr) 1982-05-04

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