AU2007216649A1 - Process of manufacturing paper container with thermal insulation property - Google Patents

Process of manufacturing paper container with thermal insulation property Download PDF

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Publication number
AU2007216649A1
AU2007216649A1 AU2007216649A AU2007216649A AU2007216649A1 AU 2007216649 A1 AU2007216649 A1 AU 2007216649A1 AU 2007216649 A AU2007216649 A AU 2007216649A AU 2007216649 A AU2007216649 A AU 2007216649A AU 2007216649 A1 AU2007216649 A1 AU 2007216649A1
Authority
AU
Australia
Prior art keywords
thermal insulation
paper container
polyethylene film
paper
manufacturing process
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.)
Abandoned
Application number
AU2007216649A
Inventor
Shih-Hung Chen
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.)
JOY PAPER CO Ltd
Original Assignee
JOY PAPER 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 JOY PAPER CO Ltd filed Critical JOY PAPER CO Ltd
Priority to AU2007216649A priority Critical patent/AU2007216649A1/en
Publication of AU2007216649A1 publication Critical patent/AU2007216649A1/en
Abandoned legal-status Critical Current

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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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
    • 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
    • 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
    • B65D81/38—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 with thermal insulation
    • B65D81/3865—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 with thermal insulation drinking cups or like containers
    • B65D81/3874—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 with thermal insulation drinking cups or like containers formed of different materials, e.g. laminated or foam filling between 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B32B2038/042—Punching
    • 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
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/02—Temperature
    • 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
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/02—Open containers
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
    • B32B37/20—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of continuous webs only
    • B32B37/203—One or more of the layers being plastic
    • B32B37/206—Laminating a continuous layer between two continuous plastic layers
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0036—Heat treatment
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/12—Deep-drawing
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/14—Printing or colouring
    • B32B38/145—Printing

Description

PROCESS OF MANUFACTURING PAPER CONTAINER WITH THERMAL INSULATION PROPERTY BACKGROUND OF THE INVENTION Field of the Invention The present invention is related to a process for manufacturing of thermal insulation paper container, and more particularly to a summary, reliable, and cost saving process involving vaporization foaming and coating of HD and LD polyethylene on inner and outer surfaces of a substrate to create falls in formation of a thermal insulation layer on outer skirt of a paper container without adding any foaming agent or any auxiliary.
Description of the Prior Art: Consumption of paper containers has become an important link in environmental life since they permit recycling, and are free of pollution when incinerated; furthermore, paper container can be made in any shape, available at cheap price to be comprehensively favored and used by the general public.
Whereas a paper container is usually not provided with thermal insulation property, a thermal insulation device including a handle is externally provided to facilitate access. However, appearance of a handle is not fully complaint with consumer behavior; therefore, it can be improved should the paper container itself is given the thermal insulation property.
So far there are several types of thermal insulation paper container are generally available in the market; and the common structure of these paper containers involves addition of a thermal insulation layer to the perimeter of the container either by binding or by insertion. However, significant increase of process procedure and cost of material make the paper container wrapped up with an outer layer of thermal insulation not practical for use and failing economic benefit, and therefore not popularly used. Another process involves a single outer layer made of specific plastic film or plastic agent through wrapping up, coating, and secondary heating processes in sequence. The plastic film or agent by forming on a surface of the paper container a foamed thermal insulation layer to stop temperature in the container to diffuse into the air though appears to provide better fastness, easier process, and economic production than providing a thermal insulation layer by binding or by insertion; chemical auxiliary or foaming agent is added to the plastic film or plastic agent in the foaming process of the thermal insulation layer to promote simple expansion and foaming on the surface of the container when heated; accordingly, the process essentially involves the addition of auxiliary or foaming agent that will lead to adverse use of the container when the otherwise food grade or toxin free grade plastic film or agent is affected by the addition, and even toxic gas and/or gas is released during external diffusion of high temperature at local part in the container to cause safety concerns. This explains that even though the surface foaming is considered as a matured technology, very few manufacturers would like to employee the technology for surface treatment of the container.
In similar to those process problems in the manufacturing of the conventional thermal insulation layer or foaming insulation layer as described above, citations of Japanese patents of Nos. 303350, 231887, and 202478, and Taiwan Patent No. 87113343 titled "Tubular Raw materials of Thermal Insulation Paper Container, Thermal Insulation Paper Container and Manufacturing Process Thereof are better qualified representative manufacturing process. As told in Taiwan Patent No. 87113343 for the raw materials and the manufacturing process disclosed, it can be fully understood that its purpose is also the same by laminating on "an outer wall" 3 of the container with thermoplastic epoxy film of low melting point and coating a synchronous ink that synchronously forms on the surface of the container as claimed in Claim 1 of the cited Patent No. 87113343. That is, the key point of the technology applied and the primary purpose of the manufacturing purpose heating the container are subjecting a coated "synthetic epoxy film to heat" for the synthetic epoxy film to start expansion and foaming, and the manufacturing process also will result in food and environmental problems due to the use of the foaming agent or auxiliary.
SUMMARY OF THE INVENTION The primary purpose of the present invention is to provide a manufacturing process of paper container with thermal insulation property to solve problems found with the prior art. To achieve the purpose, a paper substrate is coated on its outer surface with a layer of LD polyethylene film and on its inner surface with a layer of HD polyethylene film; with both layers of coating applied on the paper substrate and comparative fall of density between the LD and HD polyethylene films, vaporization of residual water containment in the coated paper substrate when heated merely causes vapor to be blocked by the coated HD polyethylene film thus to externally diffuse into the coated LD polyethylene film; the coated LD polyethylene film is foamed due to vaporization to create a foamed layer in proper thickness and providing thermal insulation effects. The manufacturing process of the present invention is essentially characterized in that the physical material expansion process along achieves convenient and economic purposes without adding chemical foaming agent or auxiliary, and a finished product of paper container provides multiple practical benefits including food safety.
Another purpose of the present invention is to provide a process for 4 manufacturing of a thermal insulation paper container that gives long term shelf life and better health effects without being deteriorated by humidity or affected by development of mould. To achieve the purpose, residual water containment when the paper container is heated is vaporized, and the vapor externally diffuses to permeate into LD polyethylene film coated on the perimeter of the paper container to form a foamed layer provided with thermal insulation effects; accordingly, the dehydrated container is covered with an inner layer of polyethylene not foamed and an outer layer of polyethylene already foamed to retain its dry status for preventing mould.
BRIEF DESCRIPTION OF THE DRAWINGS Embodiments of the invention will now be described in more detail with reference to the accompanying drawings, in which: Fig. 1 is a schematic view showing compositions of a thermal insulation paper container of the present invention.
Fig. 2 is an exploded view of those components of a finished product manufactured using a process of the present invention.
Fig. 3 is a schematic view showing the finished product manufactured using the process of the present invention as assembled.
Fig. 3A is a sectional view showing a structure of those compositions before a foaming process.
Fig. 3B is a sectional view showing a structure of those compositions after the foaming process.
Fig. 4 is a chart showing a manufacturing process flow path of the present invention.
Fig. 5A is a magnified sectional view showing a structure of those
OU
compositions before the vaporization foaming process of the present invention.
Fig. 5B is a magnified sectional view showing a structure of those O compositions after the vaporization foaming process of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to Fig. 1, a paper container with thermal insulation property of
,N-
the present invention is comprised of a LD polyethylene film a HD polyethylene film, a paper substrate and a print ink film Wherein, c The LD polyethylene film (11) is related to a food grade material with melt flow rate (MFR) of 7.8, density of 0.91 g/cm 0.92 g/cm, and a melting point of 103'C; The HD polyethylene film (12) contains grains of food grade material with MFR of 8, density of 0.92g/cm or above, and a melting porting of 135°C; The paper substrate (13) is related to a food grade paper with a base weight of 190 g/m 310 g/m and water containment of and The print ink film (14) is either water or oil-based.
The manufacturing process of the present invention as illustrated in Figs. 2, 3, 3-A and 4 is comprised of: Apply the LD polyethylene (11) on an outer side of the paper substrate (13) in a film thickness of 0.12 mm-0.028 mm; (11) Apply the HD polyethylene (12) on an inner side of the paper substrate (13) in a film thickness of 0.12 mm-0.028 mm; (111) Print a pattern using the print ink (14) on a surface of the LD polyethylene film (11) coated on the outer side of the paper substrate (13); (IV) Punch the paper substrate (13) already completed with steps 6 (11) and (111) into a paper container combined in a finished form with an upper portion (21) and a base plate (22); The paper container is then placed in a hot air circulation oven to be subject to a hot air at temperature of 1350 1507 to generate steam Whereas the steam for being blocked by the HD polyethylene film (12) coated on the inner side of the paper substrate (13) is externally discharged for the LD polyethylene film (11) to develop a foamed layer (11A) on an outer surface of the paper container that is provided with thermal insulation effects (referring to comparisons between Figs. 3A and 3B as well as between Figs. 5A and S0 Features and advantages of the manufacturing process for the paper container with thermal insulation property are listed below: A highly foaming result provided by the LD polyethylene film (11) when vaporized makes it is feasible that 0.012mm-0.028 mm thickness of the coating of the LD polyethylene film (11) is sufficient to realize the expected thermal insulation property for the paper container thus to effectively save materials and production cost.
It is possible to use food grade materials for all components and the paper container is safe and toxin free since no addition of chemical foaming agent or auxiliary is needed in the manufacturing process of the present invention.
Whereas the outer side of the paper substrate (13) is coated with the LD polyethylene film water- or oil-based print ink may be applied.
The MFR for the HD polyethylene film (12) may be of 8g/10m; and the LD polyethylene film 7.8g/1Om.
A low density feature of the LD polyethylene film (11) allows the foaming time shortened to 30 seconds up to two minutes to help upgrade production efficiency.
The reference to any prior art in this specification is not, and should not be taken as an acknowledgement or any form of suggestion that the referenced prior art forms part of the common general knowledge in Australia.
In the specification and the claims the term "comprising" shall be understood to have a broad meaning similar to the term "including" and will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps. This definition also applies to variations on the term "comprising" such as "comprise" and "comprises".

Claims (6)

1. A thermal insulation paper container manufacturing process comprising: Apply a LD polyethylene film on an outer side of the paper substrate; (11) Apply a HD polyethylene film on an inner side of the paper substrate; (111) Print a pattern using the print ink on a surface of the LD polyethylene film coated on the outer side of the paper substrate; (IV) Punch the paper substrate already completed with steps (11) and (111) into a paper container; and The paper container is then placed in a hot air circulation oven to be subject to a hot air at temperature of 1350C 1500C to generate steam; the steam for being blocked by the HD polyethylene film coated on the inner side of the paper substrate is externally discharged for the LD polyethylene film to develop a foamed layer on an outer surface of the paper container that is provided with thermal insulation effects.
2. A thermal insulation paper container manufacturing process as claimed in Claim 1, wherein a thickness of the LD polyethylene film coated on the outer side of the paper substrate is 0.12mm-0.028mm.
3. A thermal insulation paper container manufacturing process as claimed in Claim 1, wherein a thickness of the HD polyethylene film coated on the inner side of the paper substrate is 0.12mm-0.028mm. 9
4. A thermal insulation paper container manufacturing process as claimed in Claim 1, wherein a melt flow rate (MFR) for the HD polyethylene film is 8g/10m; and the LD polyethylene film, 7.8g/10m.
A thermal insulation paper container manufacturing process substantially as hereinbefore described with reference to the accompanying drawings.
6. A thermal insulation paper container manufactured by a process according to any one of the preceding claims.
AU2007216649A 2007-09-06 2007-09-06 Process of manufacturing paper container with thermal insulation property Abandoned AU2007216649A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2007216649A AU2007216649A1 (en) 2007-09-06 2007-09-06 Process of manufacturing paper container with thermal insulation property

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2007216649A AU2007216649A1 (en) 2007-09-06 2007-09-06 Process of manufacturing paper container with thermal insulation property

Publications (1)

Publication Number Publication Date
AU2007216649A1 true AU2007216649A1 (en) 2009-03-26

Family

ID=40475185

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2007216649A Abandoned AU2007216649A1 (en) 2007-09-06 2007-09-06 Process of manufacturing paper container with thermal insulation property

Country Status (1)

Country Link
AU (1) AU2007216649A1 (en)

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MK5 Application lapsed section 142(2)(e) - patent request and compl. specification not accepted