WO2007042052A1

WO2007042052A1 - Process for producing a combination packing container

Info

Publication number: WO2007042052A1
Application number: PCT/EG2006/000002
Authority: WO
Inventors: Mohamed Salah Hussien Gad Shoaib
Original assignee: Shoaib Mohamed Salah Hussien G
Priority date: 2005-10-10
Filing date: 2006-01-17
Publication date: 2007-04-19

Abstract

A new CompCan pack consists of several materials like paper & plastic for example. Plastic container made directly or indirectly inside the pack by many plastic processes, allow the pack to be filled with liquids with excellent barring properties & suitable for food & nonfood materials, other way the pack can be printed with a top quality printing.

Description

process for producing a combination packing container

Technical field

The CompCan Pack invention belongs mainly to the packaging field & it is also related to printing & plastics field .

Background Art

Background art is the traditional tin can or aluminum can or plastic container or even composite can made from paper or other materials .

The background art has some problem comparing to the CompCan Pack, it is as follows,

The tin can or plastic container is heavy because of its high density Vs paper in the CompCan Pack

__It is difficult to be printed & cost a lot of money & time specially with the plastic container or the 2 pieces can , because those are a 3d shapes while the best quality printing has to be on a 2d surface like paper or films

_the material used in the background art is expensive & lower yield than the CompCan Pack material like paper

_ the thermal conductivity of the material used in background art is higher than paper in the CompCan Pack which that mean it can not stay cool out of the refrigerator specially in the hot whether like tin or aluminum can .

Disclosure of Invention

The idea is to have a very thin wall container with an external paper body that can support those thin walls & add durability & quality printing with low price. (FIG.l)

_ the CompCan Pack consists of several materials it can be filled with liquids or dry material .

_ the CompCan Pack consists of 4 sections as follow . 1) External body

2) Internal body &barriers layers

3) Lid/cap

4) Bottom

External body

_the external body made from paper or fiber materials & it has a high quality printing surface, it can be a folded or unfolded paper body like spiral wound paper tube or parallel wound paper tube or folded /corrugated carton.

__ the external body can be printed with many quality process like lithographic offset printing ,gravure , flexographic , or even silkscreen or digital printing or any printing process because it can be printed as a sheet & then form it into the desired shape .

Internal Body & barriers

__ the internal body is made from a thermoplastic materials & it can be produced by many process like thermoforming (drawing page 2/8) or extrusion blow molding (drawing page 3/8) or injection molding

(drawing page 5/8) or injection blow molding (drawing page 4/8)

_ the internal body can be made directly by a special process or indirectly by traditional plastic processes to the external body

_ Barriers can take place in the internal plastic container or in the internal layer of the external Paper body,

_ for the internal container barriers, it can be made from a multi layer plastic material which use a precise combination of plastics to have the desired barring ability , for example ...

- for normal barrier , Polystyrene sheet (ps) with a permeability of (.9mm thickness ) as follows.

02 166.67 gr/m2*24h*atm

N2 43.86 cc/m2*24h*atm

CO2 1316.67 gr/m2^!i!24h*atm

H2O 1.24 cc/m2*24h*atm

for medium barrier , 2 layers of Polyethylene terephthalate / Polyethylene (PET/PE) with a permeability as follows ,

02 4.87 gr/m2*24h*atm

N2 1.11 cc/m2*24h*atm

CO2 34.02 gr/m2*24h*atm _ H2O 1.25 cc/m2*24h*atm

For high barrier , 3 layers of PET / EVOH / PE with a permeability as follows ,

O2 .0791 gr/m2*24h*atm

N2 .0106 cc/m2*24h*atm

CO2 .5074 gr/m2*24h*atm

H2O 1.145 cc/m2*24h*atm

- For ultra high barrier , use the multi layer plastic PET/EVOH/PE for the internal container + an alufoil or film in the internal layer of the external paper body . that means to use both container to perform an ultra high barriers container .

- The internal plastic container can perform a very thin wall with a thick bottom container that act as the CompCan Pack rigid bottom .

The lid/cap

_ the CompCan Pack can use a lot of closing process & caps according to the desired application

_ the CompCan Pack can be closed by tin lid (FIG.17) using the double seaming process the same as the tin cans & aluminum cans

_ the internal plastic container edge is quite suitable to be closed with heat seal process or rf welding using a heat sealable film or laminated alufoil .

_ a paper cap is also suitable for the CompCan Pack, the cap made from paper tube or folded carton can be attached to the Composite Pack easily

(FIG.18)

The bottom

_ the bottom can be the same as the lid

_ the internal plastic body can perform a very rigid bottom from its material while processing by any of plastic process (FIG.17)

_ crimpling the external paper body allow the internal container to be greatly fixed in the external paper body . (FIG.19) Industrial applicable

The CompCan Pack is very flexible it fits a lot applications like Carbonated drinks , the solid structure of the Composite Pack makes it able to handle pressure over 100 psi & a very good barring ability .

_ It can be filled with food or nonfood materials , in the case of food material we can use a suitable direct food contact material like Polyethylene for example .& in the case of nonfood materials , the choice is according to the kind of material , for example Polystyrene is not suitable for organic solvent while Polyethylene has a good resistance for the same material.

_ the CompCan Pack is very flexible to be filled & closed with the most filling / closing / sterilizing production lines , with no need for a special tool or machines .

Breif Description of the Drawings:

page 1/8

The (FIG.l) is for the CompCan Pack in a cylinder shape , the external Body is in dark shade & the internal plastic body is in light shade as seen in drawing, a cross section for the internal plastic body to show how it looks like inside the external body.

page 2/8

Parts

1 = removable pressure plate

2 = Heating elements

3 = plastic material

4 = external body

5 = support plate

6 = removable bottom lever

7 = thermal coating

8 = trimming tool

_ the plastic material is heated just before the melting point by the heating elements .(FIG.2)

_ removable bottom lever takes action to touch the heated plastic material & absorb the calculated heat form the material , a special heat conductive material is used for each desired bottom , the thickness of the bottom depend on how fast the lever will cool the heated plastic material .(FIG.3) the pressure plate move to seal the heated plastic with the external body & the bottom lever begin to move down . (FIG.4)

_ the pressure begin blowing the heated plastic material & form the internal plastic in the external body. (FIG.5) the Iximming tool trim the waste plastic material .(FIG.6)

page 3/8

Parts

9 = extrusion die

10 = air pressure nozzle 11 = heated plastic material

12 = external body

13 = open / close base plate

14 = air pressure

15 = air out __the heated plastic material come out from the extrusion die in a form of a tube until the tube reaches lower the base plate . (FIG.7)

_ the base plate is now close & seal the extruded molten plastic tube at the bottom. (FIG.8)

__ the air pressure begin blowing the molten tube inside the external body

& the tube is formed tightly inside the external body. (FIG.9)

_after the frimming process , the CompCan pack is complete . (FIG.10)

page 4/8

Parts

17 = Plastic injection male die

18 = plastic injection female die

19 = injection nozzle

20 = molten plastic material

21 = pre formed shape

22 = pressure plate

23 = external body

24 = lower plate

25 = complete composite pack

_ injecting the molten plastic material ,to have the pre formed internal container . (FIG.11)

_ the die is open & the preformed plastic is steel flexible & just over the melting point . (FIG.12)

_ replace the traditional blow die with the external body & begin blowing the pre formed plastic inside the external body. (FIG.13)

_ this process can be done without trimming or any waste , now the

CompCan pack is complete .(FIG.14)

page 5/8

Part/

26 = Male die

27 = external body

28 = lower plate

29 = extrusion nozzle

30 = molten plastic material 33 = composite pack

The male die are in the external body, the molten plastic material is filled the space between the male die & the external body ,the molten plastic material is now cool & hard because . (FIG.15) A complete CompCan pack is made. (FIG.16)

page 6/8

Tin or aluminum led used for closing some types of the CompCan pack.(FIG.17)

page 7/8

Paper cap or cover made from paper tube with crimpled edge & closed with a circle shape carton .

page 8/8

Section in the CompCan pack .shows how the internal plastic container fixed in the external paper body crimpled edge .(FIG.19)

Claims

1) the idea to have a thin wall container with a bottom as desired , the wall is thinner than the wall in the traditional plastic container , a paper or fiber body will hold & support & protect the thin wall internal container . (FIG.l)

2) the process to make the internal plastic container by thermoforming directly in the folded or un folded paper or fiber body of any available shapes (drawing page 2/8)

3) the process to make the internal plastic container by injection blow molding directly in the folded or un folded paper or fiber body of any available shapes (drawing page 4/8)

4) the process to make the internal plastic container by extrusion blow molding directly in the folded or un folded paper or fiber body of any available shapes (drawing page 3/8)

5) the process to make the internal plastic container by injection molding directly in the folded or un folded paper body of any available shapes (drawing page 5/8)

6) use the traditional plastic processes to make the internal plastic container & then fix it in an unfolded paper or fiber body of any shapes

7) the internal plastic container / external paper or fiber body combination perform a new technique for ultra high barring properties , the idea is to use a multi layers plastic material which has a high barrier ability , with an aluminum foil or barrier films in the layers of the external paper or fiber body, which will make a double barrier action , the first is in the multi layer internal plastic container & the second is in the external body layers .