GB2102765A - Bags - Google Patents

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Publication number
GB2102765A
GB2102765A GB08109587A GB8109587A GB2102765A GB 2102765 A GB2102765 A GB 2102765A GB 08109587 A GB08109587 A GB 08109587A GB 8109587 A GB8109587 A GB 8109587A GB 2102765 A GB2102765 A GB 2102765A
Authority
GB
United Kingdom
Prior art keywords
ply
bag
face
sheet material
regions
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Withdrawn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
GB08109587A
Inventor
Peter Hirst
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB08109587A priority Critical patent/GB2102765A/en
Publication of GB2102765A publication Critical patent/GB2102765A/en
Withdrawn legal-status Critical Current

Links

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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • B32B2266/0221—Vinyl resin
    • B32B2266/0228—Aromatic vinyl resin, e.g. styrenic (co)polymers
    • 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
    • B32B2307/31—Heat sealable
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/02—Open containers
    • B32B2439/06—Bags, sacks, sachets

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Bag Frames (AREA)

Abstract

A bag having good heat insulative properties and affording protection to articles carried therein is formed of a sheet material having first and second plies (1, 2) secured together in face to face relationship. The first ply (1) is formed of a flexible synthetic plastics material e.g. polyethylene or p.v.c. and the second ply (2) is formed of a flexible foamed synthetic plastics material e.g. polystyrene or polyolefin. The bag is formed as a consequence of the sheet material being folded in a manner such that regions of the first ply are brought into face to face relationship followed by the securing together of said regions. A third ply may be present. <IMAGE>

Description

SPECIFICATION Improvements in or relating to bags This invention relates to bags and is concerned with bags formed of synthetic plastics materials.
Bags formed of polyethylene and similar thermoplastic plastics materials have been known for many years. Although such bags are waterproof and have other useful characteristics, they do suffer from the disadvantage that they do not afford protection to articles carried therein. Further, in view of the very thin film materials from which these bags are made, they do not have good heat insulative properties.
It is an object of the present invention to provide bags which do not suffer from these disadvantages.
According to the present invention there is provided a bag formed of a sheet material having first and second plies secured together in face to face relationship wherein the first ply is formed of a flexible synthetic plastics material, the second ply is formed of a flexible foamed synthetic plastics material, and the bag is formed as a consequence of the sheet material being folded in a manner such that regions of the first ply are brought into face to face relationship followed by the securing together of said regions.
The material from which the first ply is made may be any suitable film forming material and is preferably, but not necessarily, heat sealable. Examples of suitable materials for the first ply are polyethylene and other polyolefins, and polyvinyl chloride. The second ply may be formed of any suitable material such as foamed polystyrene or foamed polyolefin.
The two plies of the sheet material may be secured together in any suitable manner and ordinarily they will be laminated together using a suitable adhesive.
Depending upon the nature of the material from which it is made, it may be necessary to treat the surface of the first ply in a conventional manner in order to make it more receptive to the adhesive being used.
In the case where the folding operation used to produce the bag is such that regions of the second ply are also brought into face to face contact, these regions also may be secured together using, for example, a suitable adhesive. If desired, the sheet material from which the bag is made may include a third ply on the opposite surface of the second ply to the first, the third ply preferably also being formed from flexible synthetic plastic material. In this case, the materials of the first and third ply may be the same or different and the foamed material of the second ply will be sandwiched between the first and third plies. The material ofthethird ply may optionally be paper.
The relative thicknesses of the plies of the sheet material may be selected in dependence upon the nature to which the bag is to be put. In this regard, the bag may be used for accommodating articles of a delicate or fragile nature such as small electrical components, glassware etc in which case the foamed second ply will give valuable protection to the articles. Alternatively, the bag may be used as a carrier bag having valuable heat insulative properties. In this case, the bag is useful for accommodating hot food in a manner such that the heat will be retained for a period during transit or for carrying cold food where it is desired that any increase in temperature of the food during transit should be minimised.
The bag may be formed from sheet material in any desired manner provided that it is formed by securing together adjacent regions of the first ply. Thus, for example, the bag may have a bottom seal or side seals as the case may be.
For a better understanding of the invention and to show howthe same may be carried into effect, reference will now be made, by way of example, to the accompanying drawing in which: Figure lisa perspective view of a bag in accordance with the present invention, Figure 2 is a plan view of sheet material at an intermediate stage in the manufacture of the bag of Figure 1,and Figure 3 is a section along lihe Ill-Ill of Figure 2.
Referring to the Figures, the sheet material from which the bag is made is formed of a first ply 1 and a second ply 2. The first ply 1 is formed of polyethylene film (either high or low density polyethylene is suitable) and the material of the second ply is foamed polystyrene. The sheet material is manufactured by suitably treating discrete areas 3 of a length of polyethylene film 1 so that these areas 3 are receptive to adhesive. Thereafter, sheets 2 of foamed polystyrene are then laminated to these treated areas 3 using pressure and an appropriate adhesive. Thereafter, the sheet material is folded along dotted line 4 so that untreated regions of the polyethylene film 1 come into face to face contact and similarly regions of the foamed polystyrene also come into face to face contact.If desired, a suitable adhesive may be applied to the marginal areas of the sheets 2 of foamed polystyrene so that these marginal areas can be adhered together. In any event, the opposing untreated surfaces of the polyethylene film 1 are heat sealed together to form a plurality of bags joined together and these are then separated in conventional manner to form a plurality of seperate bags as shown in Figure 3 each having side seals.
1. A bag formed of a sheet material having first and second plies secured together in face to face relationship wherein the first ply is formed of a flexible synthetic plastics material, the second ply is formed of a flexible foamed synthetic plastics mater ial, and the bag is formed as a consequence of the sheet material being folded in a manner such that regions of the first ply are brought into face to face relationship followed by the securing together of said regions.
2. A bag as claimed in claim 1 wherein the mater ial from which the first ply is made is heat sealable.
3. A bag as claimed in claim 2 wherein the heat sealable material is a polyolefin.
4. A bag as claimed in claim 3 wherein the heat sealable material is polyethylene.
5. A bag as claimed in claim 1 wherein the mater ial from which the first ply is made is polyvinyl chloride.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (15)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in or relating to bags This invention relates to bags and is concerned with bags formed of synthetic plastics materials. Bags formed of polyethylene and similar thermoplastic plastics materials have been known for many years. Although such bags are waterproof and have other useful characteristics, they do suffer from the disadvantage that they do not afford protection to articles carried therein. Further, in view of the very thin film materials from which these bags are made, they do not have good heat insulative properties. It is an object of the present invention to provide bags which do not suffer from these disadvantages. According to the present invention there is provided a bag formed of a sheet material having first and second plies secured together in face to face relationship wherein the first ply is formed of a flexible synthetic plastics material, the second ply is formed of a flexible foamed synthetic plastics material, and the bag is formed as a consequence of the sheet material being folded in a manner such that regions of the first ply are brought into face to face relationship followed by the securing together of said regions. The material from which the first ply is made may be any suitable film forming material and is preferably, but not necessarily, heat sealable. Examples of suitable materials for the first ply are polyethylene and other polyolefins, and polyvinyl chloride. The second ply may be formed of any suitable material such as foamed polystyrene or foamed polyolefin. The two plies of the sheet material may be secured together in any suitable manner and ordinarily they will be laminated together using a suitable adhesive. Depending upon the nature of the material from which it is made, it may be necessary to treat the surface of the first ply in a conventional manner in order to make it more receptive to the adhesive being used. In the case where the folding operation used to produce the bag is such that regions of the second ply are also brought into face to face contact, these regions also may be secured together using, for example, a suitable adhesive. If desired, the sheet material from which the bag is made may include a third ply on the opposite surface of the second ply to the first, the third ply preferably also being formed from flexible synthetic plastic material. In this case, the materials of the first and third ply may be the same or different and the foamed material of the second ply will be sandwiched between the first and third plies. The material ofthethird ply may optionally be paper. The relative thicknesses of the plies of the sheet material may be selected in dependence upon the nature to which the bag is to be put. In this regard, the bag may be used for accommodating articles of a delicate or fragile nature such as small electrical components, glassware etc in which case the foamed second ply will give valuable protection to the articles. Alternatively, the bag may be used as a carrier bag having valuable heat insulative properties. In this case, the bag is useful for accommodating hot food in a manner such that the heat will be retained for a period during transit or for carrying cold food where it is desired that any increase in temperature of the food during transit should be minimised. The bag may be formed from sheet material in any desired manner provided that it is formed by securing together adjacent regions of the first ply. Thus, for example, the bag may have a bottom seal or side seals as the case may be. For a better understanding of the invention and to show howthe same may be carried into effect, reference will now be made, by way of example, to the accompanying drawing in which: Figure lisa perspective view of a bag in accordance with the present invention, Figure 2 is a plan view of sheet material at an intermediate stage in the manufacture of the bag of Figure 1,and Figure 3 is a section along lihe Ill-Ill of Figure 2. Referring to the Figures, the sheet material from which the bag is made is formed of a first ply 1 and a second ply 2. The first ply 1 is formed of polyethylene film (either high or low density polyethylene is suitable) and the material of the second ply is foamed polystyrene. The sheet material is manufactured by suitably treating discrete areas 3 of a length of polyethylene film 1 so that these areas 3 are receptive to adhesive. Thereafter, sheets 2 of foamed polystyrene are then laminated to these treated areas 3 using pressure and an appropriate adhesive. Thereafter, the sheet material is folded along dotted line 4 so that untreated regions of the polyethylene film 1 come into face to face contact and similarly regions of the foamed polystyrene also come into face to face contact.If desired, a suitable adhesive may be applied to the marginal areas of the sheets 2 of foamed polystyrene so that these marginal areas can be adhered together. In any event, the opposing untreated surfaces of the polyethylene film 1 are heat sealed together to form a plurality of bags joined together and these are then separated in conventional manner to form a plurality of seperate bags as shown in Figure 3 each having side seals. CLAIMS
1. A bag formed of a sheet material having first and second plies secured together in face to face relationship wherein the first ply is formed of a flexible synthetic plastics material, the second ply is formed of a flexible foamed synthetic plastics mater ial, and the bag is formed as a consequence of the sheet material being folded in a manner such that regions of the first ply are brought into face to face relationship followed by the securing together of said regions.
2. A bag as claimed in claim 1 wherein the mater ial from which the first ply is made is heat sealable.
3. A bag as claimed in claim 2 wherein the heat sealable material is a polyolefin.
4. A bag as claimed in claim 3 wherein the heat sealable material is polyethylene.
5. A bag as claimed in claim 1 wherein the mater ial from which the first ply is made is polyvinyl chloride.
6. A bag as claimed in any one of the preceding claims wherein the material from which the second ply is made is foamed polystyrene or a foamed polyolefin.
7. A bag as claimed in any one of the preceding claims wherein the two plies of the sheet material are secured together by laminating using an adhesive.
8. A bag as claimed in any one of the preceding claims wherein the folding operation used to produce the bag is such that regions of the second ply are also brought into face to face contact and wherein these regions also are secured together.
9. A bag as claimed in only one of the preceding claims wherein the sheet material from which the bag is made includes a third ply on the opposite surface of the second ply to the first.
10. A bag as claimed in claim 9 wherein the third ply is formed from flexible synthetic plastics material.
11. A bag as claimed in claim 10 wherein the materials of the first and third ply are the same.
12. A bag as claimed in claim 9 wherein the material of the third ply is paper.
13. A bag as claimed in any one of the preceding claims wherein it has a bottom seal.
14. A bag as claimed in any one of claims 1 to 12 wherein it has a side seal.
15. A bag as claimed in claim 1 substantially as hereinbefore described with reference to and as illustrated in Figures 1 to 3 ofthe accompanying drawings.
GB08109587A 1981-03-26 1981-03-26 Bags Withdrawn GB2102765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08109587A GB2102765A (en) 1981-03-26 1981-03-26 Bags

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08109587A GB2102765A (en) 1981-03-26 1981-03-26 Bags

Publications (1)

Publication Number Publication Date
GB2102765A true GB2102765A (en) 1983-02-09

Family

ID=10520689

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08109587A Withdrawn GB2102765A (en) 1981-03-26 1981-03-26 Bags

Country Status (1)

Country Link
GB (1) GB2102765A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4805776A (en) * 1987-10-21 1989-02-21 Tenba, Inc. Air case
DE4220957A1 (en) * 1992-06-25 1994-01-13 Buertex Buerker & Co Gmbh Packaging sleeve
WO1994012070A1 (en) * 1992-11-20 1994-06-09 Stechler Bernard G Cushioned eyeglass case
CN114408373A (en) * 2022-02-18 2022-04-29 淮安赫德兹彩色印刷包装有限公司 Multifunctional interactive packaging bag

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4805776A (en) * 1987-10-21 1989-02-21 Tenba, Inc. Air case
DE4220957A1 (en) * 1992-06-25 1994-01-13 Buertex Buerker & Co Gmbh Packaging sleeve
WO1994012070A1 (en) * 1992-11-20 1994-06-09 Stechler Bernard G Cushioned eyeglass case
CN114408373A (en) * 2022-02-18 2022-04-29 淮安赫德兹彩色印刷包装有限公司 Multifunctional interactive packaging bag
CN114408373B (en) * 2022-02-18 2023-02-28 淮安赫德兹彩色印刷包装有限公司 Multifunctional interactive packaging bag

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)