EP0011215B1 - Als Packmaterial dienende geschäumte Kunststoffteilchen - Google Patents

Als Packmaterial dienende geschäumte Kunststoffteilchen Download PDF

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Publication number
EP0011215B1
EP0011215B1 EP79104322A EP79104322A EP0011215B1 EP 0011215 B1 EP0011215 B1 EP 0011215B1 EP 79104322 A EP79104322 A EP 79104322A EP 79104322 A EP79104322 A EP 79104322A EP 0011215 B1 EP0011215 B1 EP 0011215B1
Authority
EP
European Patent Office
Prior art keywords
particles
particle
height
foamed
packing material
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
Application number
EP79104322A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0011215A1 (de
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(B1) "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/de
Application granted granted Critical
Publication of EP0011215B1 publication Critical patent/EP0011215B1/de
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 foamed plastic particles serving as packaging material in a star shape with three legs lying in one plane.
  • Packing or filling materials made of loose foamed plastic particles are known and are used in large quantities. Decisive for this are their freedom from dust, their resistance to moisture and mold, the abrasion resistance and their inert behavior towards the packaged goods as well as their low weight.
  • plastic 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 after the packaging goods are embedded, they interlock or interlock and thus form a kind of "resilient envelope" around the goods. This mutual interlocking is particularly important in order to prevent the packaged article from "wandering" through the packaging particles as a result of the vibrations in the transporter.
  • the particles forming the packaging material In contrast to the ability to interlock with other particles, there is a requirement that the particles forming the packaging material 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 will become “bridged” in the storage bunker, causing the particles to flow out evenly and thus the quantity of the particles to be disturbed or prevented. In the case of fully automatic packaging systems in particular, this leads to sensitive faults. Attempts have been made to meet these contradicting requirements for the packaging material by means of a specific shape of the foamed plastic particles, that is to say, with good interlocking or interlocking of the particles in the packaging container, at the same time to achieve good flowability when removed from the storage container.
  • the object of the invention is to provide foamable plastic particles which, after foaming, result in a packaging material which has good flowability and at the same time has good toothing properties.
  • star-shaped particles of very specific ratios of height to thickness and width meet the requirement for flowability and toothing ability particularly well, namely if they have a ratio of the particle thickness (D) to the particle height (H) of 1: 2.75 to 1: 3.3 and 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, preferably 20 to 50 mm .
  • the particles should be made of polystyrene and mixed with an incombustible blowing agent, e.g. As trichlorofluoromethane, or substances that contain non-flammable gases, e.g. B. carbon dioxide, as a blowing agent, be foamed.
  • an incombustible blowing agent e.g. As trichlorofluoromethane, or substances that contain non-flammable gases, e.g. B. carbon dioxide, as a blowing agent, be foamed.
  • the fully visible surface 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 thickness D.
  • the distance from the surface to the highest point of the particle indicates its height H.
  • Two of the three legs of the particle have a line (kink line) 1, 2 or 3 in common. The distance between these lines is called the width B of the legs.
  • thermoplastics for the particles according to the invention are the thermoplastics usually used for foamed packaging material particles, preferably polystyrene.
  • the plastic is first melted in an extruder, metering in a suitable blowing agent, preferably an incombustible, e.g. B. trichlorofluoromethane or octafluorocyclobutane, under pressure in the plastic melt and squeezing the blowing agent-containing melt through a corresponding mold opening and granulating a compact, blowing agent-containing, not foamed granules.
  • a suitable blowing agent preferably an incombustible, e.g. B. trichlorofluoromethane or octafluorocyclobutane
  • the strands emerging from the extrusion press are cooled rapidly, expediently by a water bath.
  • the cooled strands are then cut perpendicularly to the direction of take-off into particles of such a thickness that, after foaming, the ratio of D to H given above is satisfied.
  • the expandable particles formed in the manner described above can be heated to above their softening point, e.g. B. by steam to be foamed to the packaging material. This foaming is usually carried out only at the consumer.
  • the plastic can also be a chemical blowing agent before the extrusion. As 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.
  • 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 packaging particles that had a bulk volume of 80 liters.
  • the bottom surface of the container was inclined to the center at 45 degrees and had a square opening there with an edge length of 0.15 m.
  • the time it took for the packaging material to flow out of this container was taken as a measure of the flowability.
  • 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 one 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 middle 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 tests were carried out in each of the trickle and pack tests. The values obtained in this way are listed in Table 1, in which the “packing group 1” relates to particles according to the invention. The values for particles of other dimensional ratios are given under the designation »packing group « 2, 3 and 4.
  • the table shows that the particles according to the invention are 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 Als Packmaterial dienende geschäumte Kunststoffteilchen Expired EP0011215B1 (de)

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
DE19782848338 DE2848338A1 (de) 1978-11-08 1978-11-08 Freifliessendes packmaterial aus aufgeschaeumtem kunststoff
DE2848338 1978-11-08

Publications (2)

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

Family

ID=6054091

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104322A Expired EP0011215B1 (de) 1978-11-08 1979-11-06 Als Packmaterial dienende geschäumte Kunststoffteilchen

Country Status (8)

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

Families Citing this family (11)

* 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
DE3435440A1 (de) * 1983-12-10 1985-06-20 Hoechst Ag, 6230 Frankfurt Aufschaeumbares kunststoffgranulat und daraus hergestelltes packmaterial
CA1248696A (en) * 1984-04-26 1989-01-10 Blair E. Dolinar Dunnage material
US4606965A (en) * 1984-04-27 1986-08-19 Harry Bussey Loose fill packing element
DE3503057A1 (de) * 1985-01-30 1986-07-31 Hoechst Ag, 6230 Frankfurt Aufschaeumbares kunststoffgranulat und daraus hergestelltes packmaterial
USD319392S (en) 1988-12-02 1991-08-27 Rapac Loose fill packing insert
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
US20170340131A1 (en) * 2016-05-24 2017-11-30 Healthcare Co., Ltd Foam filling elements

Family Cites Families (4)

* 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
US3481455A (en) * 1968-10-10 1969-12-02 Free Flow Packaging Corp Free-flowing packing material of low bulk density
GB1262346A (en) * 1969-02-04 1972-02-02 Free Flow Packaging Corp Free flow 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

Also Published As

Publication number Publication date
US4269895A (en) 1981-05-26
DK146295C (da) 1984-02-06
DE2966625D1 (en) 1984-03-08
CA1122926A (en) 1982-05-04
DK472079A (da) 1980-05-09
EP0011215A1 (de) 1980-05-28
DE2848338A1 (de) 1980-05-22
ATE6048T1 (de) 1984-02-15
JPS5571278A (en) 1980-05-29
DK146295B (da) 1983-08-29
ES485663A1 (es) 1980-05-16
JPS6344636B2 (enrdf_load_stackoverflow) 1988-09-06

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