CA2211750A1 - Multi-layered plastic binding material - Google Patents
Multi-layered plastic binding materialInfo
- Publication number
- CA2211750A1 CA2211750A1 CA 2211750 CA2211750A CA2211750A1 CA 2211750 A1 CA2211750 A1 CA 2211750A1 CA 2211750 CA2211750 CA 2211750 CA 2211750 A CA2211750 A CA 2211750A CA 2211750 A1 CA2211750 A1 CA 2211750A1
- Authority
- CA
- Canada
- Prior art keywords
- web
- gathered
- binding material
- plastic film
- stretching
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/0003—Shaping by bending, folding, twisting, straightening, flattening or rim-rolling; Shaping by bending, folding or rim-rolling combined with joining; Apparatus therefor
- B31F1/0045—Bending or folding combined with joining
- B31F1/0048—Bending plates, sheets or webs at right angles to the axis of the article being formed and joining the edges
- B31F1/0074—Making essentially non-hollow profiles, e.g. rods, ropes, cords
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0078—Producing filamentary materials
-
- 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
- B65D63/00—Flexible elongated elements, e.g. straps, for bundling or supporting articles
- B65D63/10—Non-metallic straps, tapes, or bands; Filamentary elements, e.g. strings, threads or wires; Joints between ends thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/707—Cables, i.e. two or more filaments combined together, e.g. ropes, cords, strings, yarns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/731—Filamentary material, i.e. comprised of a single element, e.g. filaments, strands, threads, fibres
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Basic Packing Technique (AREA)
Abstract
A binding material, such as twine, formed of plastic film wrap gathered together. A
method of forming such binding material is also disclosed.
method of forming such binding material is also disclosed.
Description
CA 022117~0 1997-07-30 MULTI-LAYERED PLASTIC BINDING MATERIAL
Field of the Invention This invention relates to binding material. In particular, this invention relates 5 to multi-layered binding material made of plastic film and method of making such binding material.
Background of the Invention Binding materials, such as rope and ~llappillg, are comrnonly used in the l 0 shipping and packaging induskies. Goods are generally packed in cardboard boxes or cartons, which are then stacked on pallets for shipping. The boxes are secured to the pallets with straps running laterally and longitudinally. For increased pallet stability and protection of the goods, the strapped pallets are then wrapped in shrink wrap plastic film. When the pallet arrives at its destination and is unloaded, the film and strapping are removed and l 5 disposed of.
The most common ~ll~phlg is a relatively expensive, flat, rigid polypropylene ribbon. This form of strapping is typically supplied in 500' rolls. It is generally 1/s" l/2~ wide with a ridged or uneven surface to provide grip.
To secure a load of stacked cartons to a pallet, the ~l~ping must be tightly bound around the pallet load. Because of the sharp edges and relatively narrow width of the ribbon, crushing or cutting of the cardboard cartons, especially those at the periphery of the stack, often results.
Moreover, industry must pay to dispose of the scrap polyethylene film and polypropylene ribbon generated when pallets are unloaded. However, polyethylene film is recyclable, at a profit, if not con~rnin~ted by polypropylene.
It is known that the strength of most plastic film can be enhanced by stretchingthe film nearly to its yield point. Typically, the film reaches its yield point when it is stretched to between l 50% and 300% of its original, unstretched length. It is also known that ' CA 022117~0 1997-07-30 polyethylene plastic film has the property of adhering to itself. This property is enhanced when the plastic film is stretched as surfaces of the film are brought into contact with one another.
Summary of the Invention It is an object of the present invention to provide a novel binding material from polyethylene plastic film.
It is a further object of the present invention to provide a novel method for manufacturing binding material from polyethylene plastic film.
In an embodiment of the present invention there is provided a multi-layered binding material comprising:
a web of plastic film having a lateral dimension, and a longitudinal dimension, wherein said web is laterally gathered such that a plurality of gathered surfaces of said web contact, and wherein said web is longitudinally stretched to a near-yield point to cohere said gathered surfaces.
In a further embodiment of the present invention there is provided a method of forming a multi-layered binding material from a web of unstretched plastic film having a longitudinal dimension and a lateral dimension, comprising the steps of:
(i) feeding said web from a feeding means;
(ii) laterally gathering said web such that a plurality of gathered surfaces of said web contact creating multiple layers of film; and (iii) longitudinally stretching said gathered web to a near-yield point to cohere said gathered surfaces.
In one aspect of this embodiment there the steps of gathering and stretching occur substantially simultaneously.
CA 022117~0 1997-07-30 In a further embodiment of the present invention there is provided an apparatus for forming a multi-layered binding material from a web of plastic film having a longitudinal dimension and a lateral dimension, comprising:
feeding means for feeding said web;
gathering means located downstream of said feeding means to laterally gathering said plastic film such that a plurality of gathered surfaces of said web contact;
stretching means for longitudinally stretching said web to a near-yield point tocohere said gathered surfaces.
Brief Description of the Dr,~wil~gs The present invention may be better understood by reference to the following detailed description and attached drawings, in which:
Figure 1 is a perspective view of an apparatus for forming multi-layered binding material from a web of plastic film, in accordance with an embodiment of the present 1 5 invention;
Figure 2 is a side view of an embodiment of a gatherer of the apparatus of Figure 1;
Figure 3 is a radial cross-section of a gathered web, in accordance with an embodiment of the present invention;
Figure 4 is an axial cross-section of multi-layered binding material, in accordance with an embodiment of the present invention; and Figure 5 is a radial cross-section of the binding material of Figure 4 Detailed Description Figure 1 illustrates an embodiment of an apparatus, generally designated as 10, of the present invention. A roll 12 of unstretched plastic film, having a core 14 is mounted on a feed spindle 16. The plastic film can be linear low density polyethylene or any other suitable plastic film. The plastic film is in the form of a web 18 which may be unrolled from roll 12. Web 18 can have any width, but plastic film is commonly supplied as a 20" wide web.
' CA 022117~0 1997-07-30 Web 18 is fed from roll 12 to a roller 20. Feed spindle 16 and roller 20 are shown in a vertical orientation, but it will be apparent to anyone skilled in the art that they could be horizontal. Alternatively, the roll 12 can be supported by a pair of horizontal idler rollers (not shown) upon which it can rotate to feed web 18 to a roller, as is well know in the art. Feed spindle 16 will normally be motor controlled to feed web 18 at a predetermined rate, as is known in the art.
Web 18 is fed from roller 20 to a gatherer 22. Gatherer 22 has an aperture 24 which is generally ovoid, as shown in Figures 2.
As illustrated in Figure 4, web 18 is laterally compressed and gathered into a number of longitudinal folds 26 when threaded through aperture 24. The self-cohesive properties of the plastic film cause abutting surfaces 28 of longitudinal folds 26 to cohere and form a gathered web 30, downstream of gatherer 22.
Gathered web 30 is fed from gatherer 22 to guide rollers 32, 34 and thence to a web stretching mechanism (not shown). Typically the stretching mechanism will comprise a series of rollers having different diameters and/or rotational velocities. When gathered web 30 is fed through the stretching mech~ni~m, it is longitudinally stretched to its near-yield point, typically 150% - 300% of its original length depending on the properties of the plastic film. Equally, gatherer 22 may be integrated within the stretching mech~ni~m, if desired.
Stretching the gathered web has a number of consequences. First, as is well known, the strength of the plastic film is greatly enhanced. Secondly, stretching the film causes surfaces 28 to cohere more firmly, and flattens the gathered web 30 against the stretching rollers. As a result, after stretching, the gathered web 30 is transformed into a ribbon-like binding material 36, as shown in Figures 4 and 5, having superior strength characteristics and a width determined by the width of the original web 18 and the dimensions of aperture 24. Typically, the binding material of the present invention will have a width of approximately 2", thus redistributing forces across carton secured with the binding material and consequently reducing damage to the cartons. Moreover, the resulting binding CA 022117~0 1997-07-30 material is lightweight, inexpensive to produce, and fully recyclable along with the film wrap used to wrap pallet loads.
lt will be apparent to those skilled in the art that the foregoing is by way of 5 example only. Modifications, variations and alterations may be made to the described embodiments without departing from the scope of the invention which is defined solely in the clalms.
Field of the Invention This invention relates to binding material. In particular, this invention relates 5 to multi-layered binding material made of plastic film and method of making such binding material.
Background of the Invention Binding materials, such as rope and ~llappillg, are comrnonly used in the l 0 shipping and packaging induskies. Goods are generally packed in cardboard boxes or cartons, which are then stacked on pallets for shipping. The boxes are secured to the pallets with straps running laterally and longitudinally. For increased pallet stability and protection of the goods, the strapped pallets are then wrapped in shrink wrap plastic film. When the pallet arrives at its destination and is unloaded, the film and strapping are removed and l 5 disposed of.
The most common ~ll~phlg is a relatively expensive, flat, rigid polypropylene ribbon. This form of strapping is typically supplied in 500' rolls. It is generally 1/s" l/2~ wide with a ridged or uneven surface to provide grip.
To secure a load of stacked cartons to a pallet, the ~l~ping must be tightly bound around the pallet load. Because of the sharp edges and relatively narrow width of the ribbon, crushing or cutting of the cardboard cartons, especially those at the periphery of the stack, often results.
Moreover, industry must pay to dispose of the scrap polyethylene film and polypropylene ribbon generated when pallets are unloaded. However, polyethylene film is recyclable, at a profit, if not con~rnin~ted by polypropylene.
It is known that the strength of most plastic film can be enhanced by stretchingthe film nearly to its yield point. Typically, the film reaches its yield point when it is stretched to between l 50% and 300% of its original, unstretched length. It is also known that ' CA 022117~0 1997-07-30 polyethylene plastic film has the property of adhering to itself. This property is enhanced when the plastic film is stretched as surfaces of the film are brought into contact with one another.
Summary of the Invention It is an object of the present invention to provide a novel binding material from polyethylene plastic film.
It is a further object of the present invention to provide a novel method for manufacturing binding material from polyethylene plastic film.
In an embodiment of the present invention there is provided a multi-layered binding material comprising:
a web of plastic film having a lateral dimension, and a longitudinal dimension, wherein said web is laterally gathered such that a plurality of gathered surfaces of said web contact, and wherein said web is longitudinally stretched to a near-yield point to cohere said gathered surfaces.
In a further embodiment of the present invention there is provided a method of forming a multi-layered binding material from a web of unstretched plastic film having a longitudinal dimension and a lateral dimension, comprising the steps of:
(i) feeding said web from a feeding means;
(ii) laterally gathering said web such that a plurality of gathered surfaces of said web contact creating multiple layers of film; and (iii) longitudinally stretching said gathered web to a near-yield point to cohere said gathered surfaces.
In one aspect of this embodiment there the steps of gathering and stretching occur substantially simultaneously.
CA 022117~0 1997-07-30 In a further embodiment of the present invention there is provided an apparatus for forming a multi-layered binding material from a web of plastic film having a longitudinal dimension and a lateral dimension, comprising:
feeding means for feeding said web;
gathering means located downstream of said feeding means to laterally gathering said plastic film such that a plurality of gathered surfaces of said web contact;
stretching means for longitudinally stretching said web to a near-yield point tocohere said gathered surfaces.
Brief Description of the Dr,~wil~gs The present invention may be better understood by reference to the following detailed description and attached drawings, in which:
Figure 1 is a perspective view of an apparatus for forming multi-layered binding material from a web of plastic film, in accordance with an embodiment of the present 1 5 invention;
Figure 2 is a side view of an embodiment of a gatherer of the apparatus of Figure 1;
Figure 3 is a radial cross-section of a gathered web, in accordance with an embodiment of the present invention;
Figure 4 is an axial cross-section of multi-layered binding material, in accordance with an embodiment of the present invention; and Figure 5 is a radial cross-section of the binding material of Figure 4 Detailed Description Figure 1 illustrates an embodiment of an apparatus, generally designated as 10, of the present invention. A roll 12 of unstretched plastic film, having a core 14 is mounted on a feed spindle 16. The plastic film can be linear low density polyethylene or any other suitable plastic film. The plastic film is in the form of a web 18 which may be unrolled from roll 12. Web 18 can have any width, but plastic film is commonly supplied as a 20" wide web.
' CA 022117~0 1997-07-30 Web 18 is fed from roll 12 to a roller 20. Feed spindle 16 and roller 20 are shown in a vertical orientation, but it will be apparent to anyone skilled in the art that they could be horizontal. Alternatively, the roll 12 can be supported by a pair of horizontal idler rollers (not shown) upon which it can rotate to feed web 18 to a roller, as is well know in the art. Feed spindle 16 will normally be motor controlled to feed web 18 at a predetermined rate, as is known in the art.
Web 18 is fed from roller 20 to a gatherer 22. Gatherer 22 has an aperture 24 which is generally ovoid, as shown in Figures 2.
As illustrated in Figure 4, web 18 is laterally compressed and gathered into a number of longitudinal folds 26 when threaded through aperture 24. The self-cohesive properties of the plastic film cause abutting surfaces 28 of longitudinal folds 26 to cohere and form a gathered web 30, downstream of gatherer 22.
Gathered web 30 is fed from gatherer 22 to guide rollers 32, 34 and thence to a web stretching mechanism (not shown). Typically the stretching mechanism will comprise a series of rollers having different diameters and/or rotational velocities. When gathered web 30 is fed through the stretching mech~ni~m, it is longitudinally stretched to its near-yield point, typically 150% - 300% of its original length depending on the properties of the plastic film. Equally, gatherer 22 may be integrated within the stretching mech~ni~m, if desired.
Stretching the gathered web has a number of consequences. First, as is well known, the strength of the plastic film is greatly enhanced. Secondly, stretching the film causes surfaces 28 to cohere more firmly, and flattens the gathered web 30 against the stretching rollers. As a result, after stretching, the gathered web 30 is transformed into a ribbon-like binding material 36, as shown in Figures 4 and 5, having superior strength characteristics and a width determined by the width of the original web 18 and the dimensions of aperture 24. Typically, the binding material of the present invention will have a width of approximately 2", thus redistributing forces across carton secured with the binding material and consequently reducing damage to the cartons. Moreover, the resulting binding CA 022117~0 1997-07-30 material is lightweight, inexpensive to produce, and fully recyclable along with the film wrap used to wrap pallet loads.
lt will be apparent to those skilled in the art that the foregoing is by way of 5 example only. Modifications, variations and alterations may be made to the described embodiments without departing from the scope of the invention which is defined solely in the clalms.
Claims (4)
1. A multi-layered binding material comprising:
a web of plastic film having a lateral dimension, and a longitudinal dimension, wherein said web is laterally gathered such that a plurality of gathered surfaces of said web contact, and wherein said web is longitudinally stretched to a near-yield point to cohere said gathered surfaces.
a web of plastic film having a lateral dimension, and a longitudinal dimension, wherein said web is laterally gathered such that a plurality of gathered surfaces of said web contact, and wherein said web is longitudinally stretched to a near-yield point to cohere said gathered surfaces.
2. A method of forming a multi-layered binding material from a web of unstretched plastic film having a longitudinal dimension and a lateral dimension, comprising the steps of:
(i) feeding said web from a feeding means;
(ii) laterally gathering said web such that a plurality of gathered surfaces of said web contact; and (iii) longitudinally stretching said gathered web to a near-yield point to cohere said gathered surfaces.
(i) feeding said web from a feeding means;
(ii) laterally gathering said web such that a plurality of gathered surfaces of said web contact; and (iii) longitudinally stretching said gathered web to a near-yield point to cohere said gathered surfaces.
3. A method according to claim 2 wherein said steps of gathering and stretching occur substantially simultaneously.
4. An apparatus for forming a multi-layered binding material from a web of plastic film having a longitudinal dimension and a lateral dimension, comprising:
feeding means for feeding said web;
gathering means located downstream of said feeding means to laterally gathering said plastic film such that a plurality of gathered surfaces of said web contact;
stretching means for longitudinally stretching said web to a near-yield point tocohere said gathered surfaces.
feeding means for feeding said web;
gathering means located downstream of said feeding means to laterally gathering said plastic film such that a plurality of gathered surfaces of said web contact;
stretching means for longitudinally stretching said web to a near-yield point tocohere said gathered surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2211750 CA2211750A1 (en) | 1997-07-30 | 1997-07-30 | Multi-layered plastic binding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2211750 CA2211750A1 (en) | 1997-07-30 | 1997-07-30 | Multi-layered plastic binding material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2211750A1 true CA2211750A1 (en) | 1999-01-30 |
Family
ID=29274919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2211750 Abandoned CA2211750A1 (en) | 1997-07-30 | 1997-07-30 | Multi-layered plastic binding material |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2211750A1 (en) |
-
1997
- 1997-07-30 CA CA 2211750 patent/CA2211750A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |