GB2316652A - Cushioning material for protective bags - Google Patents

Cushioning material for protective bags Download PDF

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Publication number
GB2316652A
GB2316652A GB9618070A GB9618070A GB2316652A GB 2316652 A GB2316652 A GB 2316652A GB 9618070 A GB9618070 A GB 9618070A GB 9618070 A GB9618070 A GB 9618070A GB 2316652 A GB2316652 A GB 2316652A
Authority
GB
United Kingdom
Prior art keywords
bubbles
cushioning material
bubble
diameter
layer
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.)
Withdrawn
Application number
GB9618070A
Other versions
GB9618070D0 (en
Inventor
John Alexander Matwiejew
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.)
JIFFY PACKAGING CO Ltd
Original Assignee
JIFFY PACKAGING CO Ltd
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 JIFFY PACKAGING CO Ltd filed Critical JIFFY PACKAGING CO Ltd
Priority to GB9618070A priority Critical patent/GB2316652A/en
Publication of GB9618070D0 publication Critical patent/GB9618070D0/en
Publication of GB2316652A publication Critical patent/GB2316652A/en
Withdrawn legal-status Critical Current

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
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/007—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a foam 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
    • 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
    • B65D81/03—Wrappers or envelopes with shock-absorbing properties, e.g. bubble films
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/025—Polyolefin
    • 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
    • B32B2317/00—Animal or vegetable based
    • B32B2317/12—Paper, e.g. cardboard
    • B32B2317/122—Kraft paper
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • 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
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • B32B2553/02—Shock absorbing
    • B32B2553/026—Bubble films

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Buffer Packaging (AREA)

Abstract

A cushioning material comprises an outer layer (6) of a substrate such as Kraft, conveniently 50 to 150gms in weight, having adhered to an inner surface thereof a layer of bubble material. The bubble material comprises bubbles (18a) having a larger diameter than is conventionally used, such as 15mm in diameter or more, whilst at side regions of the cushioning material bubbles (18b) are utilised, which have a diameter conventionally used in the manufacture of protective bags, namely about 10mm in diameter. In the manufacture of a protective bag by the use of the cushioning materials, two sheets or portions of a single sheet folded about a medium line are secured together by heated bars, to cause the sheet or portions to become adhered together in the provision of side edges or seams of the protective bag. Within the protective bag the larger bubbles (18a) proliferate, providing greater protection to an article being transported by the use of the bag. If desired in addition to the layer of bubble material, further layers of resilient material such as further bubble material or foam may be utilised.

Description

Title: PROTECTIVE BAGS Description of Invention This invention relates to protective bags, and in particular provides a protective bag having improved cushioning capability, and in a cushioning material used in the manufacture of such a protective bag.
The term "bag" is used herein generically to include not only larger bags but also smaller bags or envelopes in which an article may be protected during (eg) transportation There is a large and increasing demand for protective bags particularly to protect fragile articles, eg electronic components or components of a fragile nature, during transportation such as postage. It is known to utilise in the provision of cushioning means in a protective bag a material of the kind known as "bubble material". A conventional bubble material comprises a base layer, conveniently in the form of a sheet of plastic film, and an upper layer also of plastic film provided by a forming operation such as vacuum forming with a plurality of pockets, the upper layer being secured to the base layer in a manner such as to retain air trapped within the pockets to provide "bubbles" which in use act as cushioning means, such material being referred to hereinafter as being of the kind specified.
Conventionally used in the provision of a protective bag is a bubble material of the kind specified having pockets of a diameter of approximately 10 mm, ie a volume of less than 400cmm. The capability of the cushioning material to cushion shocks is determined in part by the thickness and density of the material utilised in the manufacture of the upper layer, determining the ability of the upper layer to deform in the absorbency of shock. Nonetheless, in practice the capability of a bubble to be compressed is limited to about 3mm in the radial direction. Forces acting on a bubble to an extent greater than this will cause the bubble to burst. Thus decellerative forces acting on an article protected by the use of such a material are high.
Additionally whilst under maximum compressive loading the effective depth of projection provided by the bubble material is in the order of 2.5mm, and there is thus the capability of the bubble material being penetrated to cause damage to the article being protected, by a relatively short instrument.
According to this invention there is provided a cushioning material comprising a layer of substrate and a layer of bubble material of the kind specified, the base of the layer of bubble material being secured to the substrate, wherein the radius of the bubbles of the bubble material is larger than has been used here before.
Preferably the bubbles are greater than 15mm in diameter, preferably greater than 20mm, and preferably greater than 25 mum. Most advantageously used are bubbles having a diameter of about 30mm or more.
Alternatively preferably the bubbles each have a volume greater than 1Kcmm, preferably greater than 6Kcmm and most advantageously about 10 Kcmm or more.
The substrate may be any convenient material used for the manufacture of a protective bag, but conventionally used is "Kraft", preferably having a weight of 506150 grammes/sq meter.
Preferably the Kraft has adhered thereto a film of plastic material, conveniently a polyethylene film, by which the base layer of the bubble material may be adhered to the Kraft.
If desired whilst the cushioning material comprises a layer of bubble material having bubbles of a radius larger than conventionally used, if desired the cushioning material may also comprise bubble material having bubbles of smaller diameter, particularly at edge reasons thereof, or regions which in the manufacture of a protective bag afford to the edge reasons of the bag, such that on securing two sheets or portions of cushioning material together in the provision of a bag, either one or both side edges of the bag and/or the opening end of the bag are at regions where smaller bubbles are located. In this way greater integrity is obtained at said side edges where the two sheets or portions are secured together and at the opening, severed end.
If desired the layer of bubble material having bubbles of greater radius may be utilised in conjunction with one or more additional layer of bubble material (which may comprise bubbles of conventional size, or bubbles of a size larger than conventional) or of resilient foam material, or both.
There will now be given a detailed description, to be read with reference to the accompanying drawings, of a cushioning material which is a preferred embodiment of this invention, having been selected for the purpose of illustrating the invention by way of example.
The accompanying drawing is a schematic sectional view of a sheet of the cushioning material which is the preferred embodiment of the invention, the components of which are being shown to a larger scale.
The cushioning material which is the preferred embodiment of this invention comprises an outer layer 6 of Kraft, conveniently 50-150 grammes in weight, having adhered to an inner surface thereof a layer 8 afforded by polyethylene film. The cushioning material also comprises a layer 12 of bubble material of the kind specified, having a base layer 14 and a layer 16 in which a plurality of pockets 18 are provided, the layer 16 being adhered to the layer 14 in such a manner that air within the pocket 18 affords "bubbles" in the outer layer 16, in a conventional manner.
In accordance with this invention the bubble material comprises bubbles 18a having a larger diameter than is conventionally utilised, in particular greater than 20mm in diameter, preferably about 30mm in diameter. Conversely, the bubbles at side edge regions of the cushioning material comprise bubbles 18b of a diameter conventionally used in the manufacture of protective bags, namely about lOmm in diameter.
In the manufacture of a protective bag by the use of the cushioning material which is the preferred embodiment of this invention, two sheets or portions of a single sheet (obtained by folding the single sheet about a median line) are secured together by heated bars, to cause the sheets or portions to become adhered together in the provision of side edges or seams of the protective bag. Within the protective bag the larger bubbles 18a proliferate, providing greater protection to an article being transported by the use of the bag.
It will be appreciated that any conventional material may be utilised as substrate for the bubble material 12, but most conveniently used is Kraft, together with bubble material manufactured from polyethylene film The cushioning material which is the preferred embodiment of the invention may be manufactured by drawing sheets of the constituent material from rolls thereof, forming the bubble layer (16) and adhering the various layers together by heat, in a continuous process.
If desired, in accordance with a first modified form of the preferred embodiment, a thin layer of polyethylene foam may be interposed between the substrate layer 6 and the layer 12 of bubble material to provide additional capability of the cushioning material and the protective bags formed therefrom.
Alternatively the foam may be secured to the bubble tips (epics) 18.
In the second modified form of the preferred embodiment, an additional layer of bubble material is utilised, conveniently secured to the apices of the bubbles 18 of the layer 12 and said additional layer may be of bubble material of the kind specified, comprising bubbles of the conventional size of approximately lOmm in diameter, or may comprise bubbles having a greater diameter.
The features disclosed in the foregoing description, or the following claims, or the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for attaining the disclosed result, as appropriate, may, separately or in any combination of such features, be utilised for realising the invention in diverse forms thereof.

Claims (17)

1 A cushioning material comprising a layer of substrate and a layer of bubble material of the kind specified, the base of the layer of bubble material being secured to the substrate, wherein the radius of the bubbles of the bubble material is larger than has been used herebefore.
2 A cushioning material according to Claim 1 wherein the bubbles are greater than 15mm in diameter.
3 A cushioning material according to Claim 2 wherein the bubbles are greater than 20mm in diameter.
4 A cushioning material according to Claim 3 wherein the bubbles are greater than 25mm in diameter.
5 A cushioning material according to any one of the preceding claims wherein the bubbles have a diameter of about 30mm or more.
6 A cushioning material according to Claim 1 wherein the bubbles each have a volume greater than lKcmm.
7 A cushioning material according to Claim 6 wherein the bubbles each have a volume greater than 6Kcmm.
8 A cushioning material according to one of Claims 6 and 7 wherein the bubbles each have a volume of about l0Kcmm or more.
9 A cushioning material according to any one of the preceding claims comprising bubble matelials having bubbles of smaller diameter.
10 A cushioning material according to Claim 9 wherein the bubbles of smaller diameter are provided at edge regions of the material.
11 A cushioning material according to any one of the preceding Claims comprising one or more additional layers of bubble material and/or resilient foam .material.
12 A cushioning material according to any one of the preceding claims wherein the substrate has a weight lying in the range 50 to 150gms per m2.
13 A protective bag comprising cushioning material according to any one of the preceding claims.
14 A protective bag according to Claim 13 as appendent to Claim 9, wherein the bubbles of smaller diameter are provided at the edge regions of the bag.
15 A cushioning material constructed and arranged substantially as hereinbefore described with a reference to the accompanying drawing.
16 A padded bag constructed of cushioning material substantially as hereinbefore described and/or shown in the accompanying drawing.
17 Any novel feature or novel combination of features hereinbefore described and/or shown in the accompanying drawing.
GB9618070A 1996-08-29 1996-08-29 Cushioning material for protective bags Withdrawn GB2316652A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9618070A GB2316652A (en) 1996-08-29 1996-08-29 Cushioning material for protective bags

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9618070A GB2316652A (en) 1996-08-29 1996-08-29 Cushioning material for protective bags

Publications (2)

Publication Number Publication Date
GB9618070D0 GB9618070D0 (en) 1996-10-09
GB2316652A true GB2316652A (en) 1998-03-04

Family

ID=10799132

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9618070A Withdrawn GB2316652A (en) 1996-08-29 1996-08-29 Cushioning material for protective bags

Country Status (1)

Country Link
GB (1) GB2316652A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITNA20080057A1 (en) * 2008-10-09 2010-04-10 Tecnopack Srl Unipersonale MULTILAYER PLASTIC LAMINATE
GB2476284A (en) * 2009-12-18 2011-06-22 Graham Robert Moulding Method and apparatus for creating the illusion of bubbles in a liquid within a container
CN103171831A (en) * 2011-12-20 2013-06-26 松下电器研究开发(苏州)有限公司 Packaging structure for refrigerator
EP3037273A4 (en) * 2013-08-22 2017-08-16 Mi-Sun Lee Electronic device case having convex surface caused by air injection, diary, and method for manufacturing same
CN107554983A (en) * 2017-10-16 2018-01-09 佛山市神风航空科技有限公司 A kind of irregular inflatable packaging pad of air bag

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093068A (en) * 1976-09-13 1978-06-06 Fox Valley Marking Systems, Inc. Packing sheet and packages formed thereby
US4181548A (en) * 1978-03-06 1980-01-01 Weingarten Joseph L Laminated plastic packaging material
US4427474A (en) * 1981-12-21 1984-01-24 Ranpak Corp. Method and apparatus for making an air cell cushioning product
US5162007A (en) * 1990-10-18 1992-11-10 Phillip Leslie Air-bubble cushion, mattress and water float items
EP0701954A1 (en) * 1994-03-24 1996-03-20 Idemitsu Petrochemical Co. Ltd. Method and apparatus for manufacturing air cushion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093068A (en) * 1976-09-13 1978-06-06 Fox Valley Marking Systems, Inc. Packing sheet and packages formed thereby
US4181548A (en) * 1978-03-06 1980-01-01 Weingarten Joseph L Laminated plastic packaging material
US4427474A (en) * 1981-12-21 1984-01-24 Ranpak Corp. Method and apparatus for making an air cell cushioning product
US5162007A (en) * 1990-10-18 1992-11-10 Phillip Leslie Air-bubble cushion, mattress and water float items
EP0701954A1 (en) * 1994-03-24 1996-03-20 Idemitsu Petrochemical Co. Ltd. Method and apparatus for manufacturing air cushion

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITNA20080057A1 (en) * 2008-10-09 2010-04-10 Tecnopack Srl Unipersonale MULTILAYER PLASTIC LAMINATE
WO2010041289A1 (en) * 2008-10-09 2010-04-15 Tecnopack S.R.L. Multi-layer laminate plastic
GB2476284A (en) * 2009-12-18 2011-06-22 Graham Robert Moulding Method and apparatus for creating the illusion of bubbles in a liquid within a container
CN103171831A (en) * 2011-12-20 2013-06-26 松下电器研究开发(苏州)有限公司 Packaging structure for refrigerator
EP3037273A4 (en) * 2013-08-22 2017-08-16 Mi-Sun Lee Electronic device case having convex surface caused by air injection, diary, and method for manufacturing same
CN107554983A (en) * 2017-10-16 2018-01-09 佛山市神风航空科技有限公司 A kind of irregular inflatable packaging pad of air bag

Also Published As

Publication number Publication date
GB9618070D0 (en) 1996-10-09

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