WO2016091761A1 - Feuille de polymère expansé - Google Patents

Feuille de polymère expansé Download PDF

Info

Publication number
WO2016091761A1
WO2016091761A1 PCT/EP2015/078712 EP2015078712W WO2016091761A1 WO 2016091761 A1 WO2016091761 A1 WO 2016091761A1 EP 2015078712 W EP2015078712 W EP 2015078712W WO 2016091761 A1 WO2016091761 A1 WO 2016091761A1
Authority
WO
WIPO (PCT)
Prior art keywords
seats
expanded polymer
polymer sheet
layer
axial
Prior art date
Application number
PCT/EP2015/078712
Other languages
English (en)
Inventor
Emanuele Ronzini
Original Assignee
Proxital S.P.A.
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 Proxital S.P.A. filed Critical Proxital S.P.A.
Publication of WO2016091761A1 publication Critical patent/WO2016091761A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/14—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed 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
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • 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
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • 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
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/04—Polyesters derived from hydroxycarboxylic acids
    • B29K2067/046—PLA, i.e. polylactic acid or polylactide
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0001—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular acoustical properties
    • B29K2995/0002—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular acoustical properties insulating
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0012—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular thermal properties
    • B29K2995/0015—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption

Definitions

  • the present invention relates to an expanded polymer sheet, such as a protective sheet for packaging or impact protection or vibration damping or used as a thermal and acoustic insulator.
  • the current and most widespread protective sheets for packaging currently are usually obtained by extruding a polymer, such as for example an expanded polyolefm made of polyethylene or polypropylene.
  • Suck material has technological limitations as regards determining the weight of the product obtained by extrusion, such weight being high.
  • An expanded product obtained with the mentioned background art is in fact characterized not only by a given thickness and height but also by a density that is measured in kilograms per cubic meter, said densities possibly becoming as low as 10 kg/m 3 .
  • An expanded polymer is in fact characterized by micro-cells that are uniformly distributed in the cross-section; such a product, for an equal formulation (main polymer and corresponding additives), is characterized by mechanical requirements that depend exclusively on the number of cells per unit surface and on their size.
  • the aim of the present invention is therefore to solve the described technical problems, by eliminating the drawbacks of the cited background art and thus devising a method that allows to provide an expanded polymer sheet, such as a protective sheet for packaging or impact protection or vibration damping or thermal and acoustic insulation, that allows to reduce the quantity by weight of the material used for its provision, so as to achieve a saving in terms of use of raw materials.
  • an expanded polymer sheet such as a protective sheet for packaging or impact protection or vibration damping or thermal and acoustic insulation
  • an object of the invention is to obtain an expanded polymer sheet, such as a protective sheet for packaging or impact protection or vibration damping or thermal and acoustic insulation, that has uniform protective characteristics over its entire surface.
  • Another object is to obtain a protective sheet for packaging or impact protection or vibration damping or thermal and acoustic insulation that requires a low consumption of material to be provided and allows to achieve a lower environmental impact and a lower cost.
  • Another object is to obtain a protective sheet for packaging or impact protection or vibration damping or thermal and acoustic insulation that has a high strength suitable to avoid any perforations and/or breakages by compression.
  • a sheet made of expanded polymer particularly a protective sheet for packaging or impact protection or vibration damping or acoustic insulation, characterized in that it is constituted by at least one first layer on which at least one second layer is superimposed, said first and/or second layers having a plurality of distinct axial seats, which have a polygonal cross-section.
  • Figure 1 is a side perspective view of a sheet according to the invention.
  • Figure 2 is a sectional view, taken along the line II-II of Figure 1 ;
  • Figures 3 and 4 are views of the invention according to Figure 2 with a different geometric shape for the axial cavities or seats.
  • the numeral 1 designates a protective sheet for packaging or impact protection or vibration damping or thermal and acoustic insulation that is provided by using a polymer such as for example a polyolefm made of polyethylene or polypropylene or a polymer of another kind, such as polylactic acid, which allow to obtain high flexibility, i.e., the ability to adapt to shapes, a low modulus of elasticity, i.e., the ability to deform according to the applied loads, and a low dynamic rigidity, i.e., the ability to absorb impacts and vibrations.
  • a polymer such as for example a polyolefm made of polyethylene or polypropylene or a polymer of another kind, such as polylactic acid, which allow to obtain high flexibility, i.e., the ability to adapt to shapes, a low modulus of elasticity, i.e., the ability to deform according to the applied loads, and a low dynamic rigidity, i.e., the ability to absorb impacts and vibrations.
  • the sheet 1 is constituted by at least one first solid layer 2 that is preferably shaped like a parallelepiped and on which at least one second layer 3, having the same width and an equal or different height or thickness, is superimposed.
  • the second layer 3 has a plurality of distinct axial seats 4, which are provided along part of its upper surface 5; such seats are open and have a polygonal cross-section.
  • the axial seats 4 thus face the lower lateral surface 6 of said first layer 2, which thus closes said axial seats 4 so as to define a longitudinal channel that has a polygonal cross- section.
  • the axial cavities or seats 4 have a rectangular or square cross- section, as shown in Figure 1 , or a substantially semicircular one, as shown in Figure 3, or a mixed one, as shown in Figure 4.
  • the axial cavities or seats 4 are arranged parallel to each other, lie on a same plane and have the same depth or different depths, as well as the same width or different widths.
  • the axial cavities or seats 4 are further mutually identical or different in terms of shape, in that it is possible to obtain on the same single second layer 3 an axial cavity or seat 4 having one shape that is flanked by an additional axial cavity or seat 4 having a different shape.
  • the axial cavities or seats 4 can be mutually equidistant or not depending on the requirements and use; thus, for example, the axial cavities or seats 4 can be arranged in a mutually mirror- symmetrical manner with respect to a central plane or arranged on a same plane or on offset planes so as to mutually cross at a selected angle.
  • the sheet (1) can be composed of a plurality of first and/or second layers which are variously mutually superimposed, the first layer being solid and/or provided with one or more axial seats having the selected shape, which in turn are superimposed or not on other identical or different axial seats provided in the facing first or second layer.
  • an expanded polymer sheet such as a protective sheet for packaging or impact protection or vibration damping or thermal and acoustic insulation, having been obtained which has a very low weight per cubic meter due to the reduced use of material thanks to the presence of the axial cavities or seats.
  • the presence of the axial cavities or seats in fact allows to reduce the amount of material used to manufacture a product having the same dimensional and volumetric characteristics for an equal thickness, height and length of the item to be protected.
  • the amount of material used is estimated to be 40-70% lower than the product obtained with the background art; it is noted that a reduction by even 1% constitutes a competitive advantage of the product both from the economic aspect and from the environmental aspect.
  • the resulting sheet has uniform protective characteristics over its entire surface, since the axial cavities or seats are mutually identical and are uniformly distributed along the entire sheet.
  • the protective sheet for packaging or impact protection or vibration damping or thermal and acoustic insulation has a low manufacturing cost and consequently reduces the expense for example for packaging the items to be protected.
  • the axial cavities or seats for equal characteristics of the expanded polymer, thus increase the flexibility of the resulting product, reduce the modulus of elasticity and dynamic rigidity, i.e., the ability to absorb impacts and vibrations.
  • the sheet 1 can have a thickness that can vary from 2 to 50 millimeters and the axial cavities or seats 4 can be mutually equidistant.
  • the sheet 1 can also be structurally repeated, in that a plurality of individual sheets 1 are provided which are then mutually coupled one above the other.

Landscapes

  • Buffer Packaging (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne une feuille de polymère expansé, en particulier une feuille d'emballage ou de protection contre les chocs ou d'amortissement des vibrations ou d'isolation acoustique, la feuille étant constituée d'au moins une première couche (2) sur laquelle au moins une seconde couche (3) est superposée, la première couche et/ou la seconde couche (2, 3) ayant une pluralité d'assises axiales distinctes (4) qui ont une section transversale polygonale.
PCT/EP2015/078712 2014-12-09 2015-12-04 Feuille de polymère expansé WO2016091761A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2014U000382 2014-12-09
ITMI2014U000382U ITMI20140382U1 (it) 2014-12-09 2014-12-09 Struttura di foglio in polimero espanso.

Publications (1)

Publication Number Publication Date
WO2016091761A1 true WO2016091761A1 (fr) 2016-06-16

Family

ID=55022421

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/078712 WO2016091761A1 (fr) 2014-12-09 2015-12-04 Feuille de polymère expansé

Country Status (2)

Country Link
IT (1) ITMI20140382U1 (fr)
WO (1) WO2016091761A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11945149B2 (en) 2018-06-26 2024-04-02 3M Innovative Properties Company Coextruded articles, dies and methods of making the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1305969A (fr) * 1969-06-04 1973-02-07
EP0027945A2 (fr) * 1979-10-25 1981-05-06 Hoechst Aktiengesellschaft Plaque composite
US4755408A (en) * 1985-11-19 1988-07-05 Noel, Marquet & Cie. S.A. Foam panels and blocks of hollow profiles
US20040197530A1 (en) * 2003-04-07 2004-10-07 Gritti Fabio Angelo Packaging and insulating plastic sheet-like element
EP2089211B1 (fr) * 2006-10-12 2013-12-25 Cambridge Enterprise Limited Procédé et appareil d'extrusion de matières ayant des canaux capillaires

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1305969A (fr) * 1969-06-04 1973-02-07
EP0027945A2 (fr) * 1979-10-25 1981-05-06 Hoechst Aktiengesellschaft Plaque composite
US4755408A (en) * 1985-11-19 1988-07-05 Noel, Marquet & Cie. S.A. Foam panels and blocks of hollow profiles
US20040197530A1 (en) * 2003-04-07 2004-10-07 Gritti Fabio Angelo Packaging and insulating plastic sheet-like element
EP2089211B1 (fr) * 2006-10-12 2013-12-25 Cambridge Enterprise Limited Procédé et appareil d'extrusion de matières ayant des canaux capillaires

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11945149B2 (en) 2018-06-26 2024-04-02 3M Innovative Properties Company Coextruded articles, dies and methods of making the same

Also Published As

Publication number Publication date
ITMI20140382U1 (it) 2016-06-09

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