CA2597766C - Plastic film - Google Patents
Plastic film Download PDFInfo
- Publication number
- CA2597766C CA2597766C CA002597766A CA2597766A CA2597766C CA 2597766 C CA2597766 C CA 2597766C CA 002597766 A CA002597766 A CA 002597766A CA 2597766 A CA2597766 A CA 2597766A CA 2597766 C CA2597766 C CA 2597766C
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- CA
- Canada
- Prior art keywords
- rough surface
- layer
- filler
- sheeting
- plastic sheeting
- 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.)
- Expired - Lifetime
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- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a plastic film having arough surface for inceasing the coefficient of friction whereby at least one side of the film is provided with a layer (2, 22, 32) which contains the rough surface. Said rough surface can either be produced using a coextrusion method or a coating method and can be provided on both sides.
Description
PLASTIC FILM
This application is a divisional application of Canadian patent Application no.
This application is a divisional application of Canadian patent Application no.
2,390,307 filed on October 26, 2000.
The invention concerns a plastic sheeting with a rough surface to increase the coefficient o-f friction.
Such shc;eting is known in practice, whereby a granular fillei- is usually ali-eady inixed into the plastic.
Howevei-, this causes the sheeting itself to be equipped with only liniited strength and the roughness is also low.
It is the task of the invention to develop a sheeting of the said type in such a way as to achieve a very good surface roughness without impairing the strength of the sheeting.
This task is solved accot-ding to the invention in that at least one siLie of the sheeting is equipped witli a layei- containing the rough surface.
ONvin~, to the separation of the cari-ier layer and the layei- with a rough surface, both can be optimally designed.
It has proved extremely advantageous if, according to an advantaQeous embodiment of the invention, the actual sheeting and the layei- ot- layers equipped with the rough surface are produced by the coextnision process.
A rational production of the sheeting is thereby guaranteed despite the separate effects on the layers.
According to the present invention, there is provided a use of a plastic sheeting to cover a viscous surface, wherein the plastic sheeting comprises at least one side with at least one layer which contains a rough surface to increase a coefficient of friction thereof;
the plastic sheeting and the at least one layer with the rough surface is produced by a coextrusion process; and the at least one layer with the rough surface is formed in the plastic sheeting by a dissolved propellant which generates gas bubbles immediately after leaving a coextrusion nozzle, the gas bubbles despoiling the at least one layer in such a way that an irregularly rough surface is produced.
According to the present invention, there is also provided use of a plastic sheeting to cover a roof surface, wherein the plastic sheeting comprises at least one side with at least one layer which contains a rough surface to increase a coefficient of friction thereof;
the plastic sheeting and the at least one layer with the rough surface is produced by a coextrusion process; and 2a the at least one layer with the rough surface is formed in the plastic sheeting by a dissolved propellant which generates gas bubbles immediately after leaving a coextrusion nozzle, the gas bubbles despoiling the at least one layer in such a way that an irregularly rough surface is produced.
According to the present invention, there is also provided a use of a plastic sheeting to cover timber boarding, wherein the plastic sheeting comprises at least one side with at least one layer which contains a rough surface to increase a coefficient of friction thereof;
the plastic sheeting and the at least one layer with the rough surface is produced by a coextrusion process; and the at least one layer with the rough surface is formed in the plastic sheeting by a dissolved propellant which generates gas bubbles immediately after leaving a coextrusion nozzle, the gas bubbles despoiling the at least one layer in such a way that an irregularly rough surface is produced.
According to the present invention, there is also provided a use of a plastic sheeting for packaging of frozen foods, wherein the plastic sheeting comprises at least one side with at least one layer which contains a rough surface to increase a coefficient of friction thereof;
the plastic sheeting and the at least one layer with the rough surface is produced by a coextrusion process; and the at least one layer with the rough surface is formed in the plastic sheeting by a dissolved propellant which generates gas bubbles immediately after leaving a coextrusion nozzle, the gas bubbles despoiling the at least one layer in such a way that an irregularly rough surface is produced.
According to the present invention, there is provided a process for producing a plastic sheeting with a rough surface to increase the coefficient of friction, comprising equipping at least one side of the sheeting with at least one layer which contains the rough surface, 2b equipping at least one side of the sheeting with at least one layer which contains the rough surface, wherein the actual plastic material sheeting and the at least one layer equipped with the rough surface is produced by the coextrusion process;
said at least one layer equipped with the rough surface is formed in the plastic material by a dissolved propellant which generates gas bubbles immediately after leaving a coextrusion nozzle, which gas bubbles despoil the at least one layer in such a way that an irregularly rough surface is produced.
According to the present invention there is also provided a process for producing a plastic sheeting with a rough surface to increase the coefficient of friction, comprising:
equipping at least one side of the sheeting with a layer which contains the rough surface, wherein at least one of the layers producing the rough surface is applied by coating; and wherein the coating consists of a binder and a filler, and the filler is equipped with a granular structure.
One advantageous embodiment of the invention lies in the fact that at least one of the layers equipped witll the rough surface contains a propellant which produces gas bubbles immediately aftei- leaving the coextrusion nozzle, which gas bubbles despoil the layer in such a way that an irregularly rough surface is created.
Sucli an embodiment has proved very advantageous.
Accordiii- to a fui-tlie-- embodiment of the invention, it is, however, also possible that at least one of the layers producing the rou(.11h surface is applied by the coatin~ metliod.
A completely separate embodiment of the layer is also made possible thereby.
A very advantageous fu--thei- embodiment of the invention is chai-actei-ized in that the coating material consists of a binder and a filler.
The invention concerns a plastic sheeting with a rough surface to increase the coefficient o-f friction.
Such shc;eting is known in practice, whereby a granular fillei- is usually ali-eady inixed into the plastic.
Howevei-, this causes the sheeting itself to be equipped with only liniited strength and the roughness is also low.
It is the task of the invention to develop a sheeting of the said type in such a way as to achieve a very good surface roughness without impairing the strength of the sheeting.
This task is solved accot-ding to the invention in that at least one siLie of the sheeting is equipped witli a layei- containing the rough surface.
ONvin~, to the separation of the cari-ier layer and the layei- with a rough surface, both can be optimally designed.
It has proved extremely advantageous if, according to an advantaQeous embodiment of the invention, the actual sheeting and the layei- ot- layers equipped with the rough surface are produced by the coextnision process.
A rational production of the sheeting is thereby guaranteed despite the separate effects on the layers.
According to the present invention, there is provided a use of a plastic sheeting to cover a viscous surface, wherein the plastic sheeting comprises at least one side with at least one layer which contains a rough surface to increase a coefficient of friction thereof;
the plastic sheeting and the at least one layer with the rough surface is produced by a coextrusion process; and the at least one layer with the rough surface is formed in the plastic sheeting by a dissolved propellant which generates gas bubbles immediately after leaving a coextrusion nozzle, the gas bubbles despoiling the at least one layer in such a way that an irregularly rough surface is produced.
According to the present invention, there is also provided use of a plastic sheeting to cover a roof surface, wherein the plastic sheeting comprises at least one side with at least one layer which contains a rough surface to increase a coefficient of friction thereof;
the plastic sheeting and the at least one layer with the rough surface is produced by a coextrusion process; and 2a the at least one layer with the rough surface is formed in the plastic sheeting by a dissolved propellant which generates gas bubbles immediately after leaving a coextrusion nozzle, the gas bubbles despoiling the at least one layer in such a way that an irregularly rough surface is produced.
According to the present invention, there is also provided a use of a plastic sheeting to cover timber boarding, wherein the plastic sheeting comprises at least one side with at least one layer which contains a rough surface to increase a coefficient of friction thereof;
the plastic sheeting and the at least one layer with the rough surface is produced by a coextrusion process; and the at least one layer with the rough surface is formed in the plastic sheeting by a dissolved propellant which generates gas bubbles immediately after leaving a coextrusion nozzle, the gas bubbles despoiling the at least one layer in such a way that an irregularly rough surface is produced.
According to the present invention, there is also provided a use of a plastic sheeting for packaging of frozen foods, wherein the plastic sheeting comprises at least one side with at least one layer which contains a rough surface to increase a coefficient of friction thereof;
the plastic sheeting and the at least one layer with the rough surface is produced by a coextrusion process; and the at least one layer with the rough surface is formed in the plastic sheeting by a dissolved propellant which generates gas bubbles immediately after leaving a coextrusion nozzle, the gas bubbles despoiling the at least one layer in such a way that an irregularly rough surface is produced.
According to the present invention, there is provided a process for producing a plastic sheeting with a rough surface to increase the coefficient of friction, comprising equipping at least one side of the sheeting with at least one layer which contains the rough surface, 2b equipping at least one side of the sheeting with at least one layer which contains the rough surface, wherein the actual plastic material sheeting and the at least one layer equipped with the rough surface is produced by the coextrusion process;
said at least one layer equipped with the rough surface is formed in the plastic material by a dissolved propellant which generates gas bubbles immediately after leaving a coextrusion nozzle, which gas bubbles despoil the at least one layer in such a way that an irregularly rough surface is produced.
According to the present invention there is also provided a process for producing a plastic sheeting with a rough surface to increase the coefficient of friction, comprising:
equipping at least one side of the sheeting with a layer which contains the rough surface, wherein at least one of the layers producing the rough surface is applied by coating; and wherein the coating consists of a binder and a filler, and the filler is equipped with a granular structure.
One advantageous embodiment of the invention lies in the fact that at least one of the layers equipped witll the rough surface contains a propellant which produces gas bubbles immediately aftei- leaving the coextrusion nozzle, which gas bubbles despoil the layer in such a way that an irregularly rough surface is created.
Sucli an embodiment has proved very advantageous.
Accordiii- to a fui-tlie-- embodiment of the invention, it is, however, also possible that at least one of the layers producing the rou(.11h surface is applied by the coatin~ metliod.
A completely separate embodiment of the layer is also made possible thereby.
A very advantageous fu--thei- embodiment of the invention is chai-actei-ized in that the coating material consists of a binder and a filler.
3 wherein the actual plastic material sheeting and the at least one layer equipped with the rough surface is produced by the coextrusion process;
said at least one layer equipped with the rough surface is formed in the plastic material by a dissolved propellant which generates gas bubbles immediately after leaving a coextrusion nozzle, which gas bubbles despoil the at least one layer in such a way that an irregularly rough surface is produced.
According to the present invention there is also provided a process for producing a plastic sheeting with a rough surface to increase the coefficient of friction, comprising:
equipping at least one side of the sheeting with a layer which contains the rough surface, wherein at least one of the layers producing the rough surface is applied by coating;
wherein the coating consists of a binder and a filler, and the filler is equipped with a granular structure; and wherein the coating is applied by drawing.
One advantageous embodiment of the invention lies in the fact that at least one of the layers equipped with the rough surface contains a propellant which produces gas bubbles immediately after leaving the coextrusion nozzle, which cas bubbles despoil the layei- in such a way that an ii-regularly rough sLu-face is created.
Such an embodiment has proved veiy advantageous.
According to a fii--ther embodiment of the invention, it is, howevcr, also possible that at least one of the layers producing the rough stuTace is applied by the coating method.
A conipletely separate embodii ent of the layer is also made possible thereby.
A vei-y advantageous fui-ther embodiment of the invention is chai-acterized in that the coating material consists of a binder and a filler.
said at least one layer equipped with the rough surface is formed in the plastic material by a dissolved propellant which generates gas bubbles immediately after leaving a coextrusion nozzle, which gas bubbles despoil the at least one layer in such a way that an irregularly rough surface is produced.
According to the present invention there is also provided a process for producing a plastic sheeting with a rough surface to increase the coefficient of friction, comprising:
equipping at least one side of the sheeting with a layer which contains the rough surface, wherein at least one of the layers producing the rough surface is applied by coating;
wherein the coating consists of a binder and a filler, and the filler is equipped with a granular structure; and wherein the coating is applied by drawing.
One advantageous embodiment of the invention lies in the fact that at least one of the layers equipped with the rough surface contains a propellant which produces gas bubbles immediately after leaving the coextrusion nozzle, which cas bubbles despoil the layei- in such a way that an ii-regularly rough sLu-face is created.
Such an embodiment has proved veiy advantageous.
According to a fii--ther embodiment of the invention, it is, howevcr, also possible that at least one of the layers producing the rough stuTace is applied by the coating method.
A conipletely separate embodii ent of the layer is also made possible thereby.
A vei-y advantageous fui-ther embodiment of the invention is chai-acterized in that the coating material consists of a binder and a filler.
4 Fig. 1 shows a plan view of a plastic sheeting which is produced together with a top layer by the coextrusion process and which is equipped with largely torn surface.
Fig. 2 shows a plan view of a plastic sheeting with a striated application of a granular filler Fig. 3 shows a plan view of a fiirther plastic sheeting with filler in a ramified form.
The 1 in Fig. I designates a plastic sheeting which consists of a base sheeting, not described in greater detail, and a surface layer 2 coextruded with it.
This surface layer 2 consists of a polyolefine, for example high-density polyethylene or polypropylene, in which a propellant is dissolved, which propellant foams when pressure is released on expulsion of the sheeting from the coexti-usion nozzle, and tears the surface of the layer. The structure of surface layer 2 shown in Fig. I is produced thereby.
In the embodiment example shown in Fig. 2, a plastic sheeting 2 1 is provided, which plastic sheeting contains a base sheeting, also not visible, which base sheeting is coated with a surface layer 22. This layer 22 consists of a binder and a filler 23, which are intimately mixed on application to the base sheeting. On application, however, a concentration of the filler 23 in interrupted longitudinal streaks takes place owing to the drawing-type application.
Conversely, in the case of a differentiated application, a ramified application structure 33 is achieved within application layer 32 on plastic sheeting 31.
In the two embodiment examples shown in Fig. 2 and 3, the binder can be applied over the entire surface or just in the area of the filler structnre.
Depending on the intended purpose, corundwn or silica sand is used as the filler, being used in a proportion of 20 to 70% of the total application weight.
The application weight is appi-oximately 5 to 50 g/m' and the particle size of the filler is 40 to 250 m.
All three embodiments result in a very high coefficient of friction for the plastic sheeting, so it can be used in ntunerous ways.
One possible application is in covering roof surfaces, makinb it possible to walk on them without a danger of slipping.
It is possible here to cover both purely timber boarding as well as viscous surfaces with the plastic sheeting.
These plastic sheetings can also be used very effectively for packaging frozen foods, since the slippage of the normally extremely smooth film packaging is effectively prevented.
It is also possible to coat the base sheeting on both sides, whei-eby various embodiments of the surface layers are possible.
Fig. 2 shows a plan view of a plastic sheeting with a striated application of a granular filler Fig. 3 shows a plan view of a fiirther plastic sheeting with filler in a ramified form.
The 1 in Fig. I designates a plastic sheeting which consists of a base sheeting, not described in greater detail, and a surface layer 2 coextruded with it.
This surface layer 2 consists of a polyolefine, for example high-density polyethylene or polypropylene, in which a propellant is dissolved, which propellant foams when pressure is released on expulsion of the sheeting from the coexti-usion nozzle, and tears the surface of the layer. The structure of surface layer 2 shown in Fig. I is produced thereby.
In the embodiment example shown in Fig. 2, a plastic sheeting 2 1 is provided, which plastic sheeting contains a base sheeting, also not visible, which base sheeting is coated with a surface layer 22. This layer 22 consists of a binder and a filler 23, which are intimately mixed on application to the base sheeting. On application, however, a concentration of the filler 23 in interrupted longitudinal streaks takes place owing to the drawing-type application.
Conversely, in the case of a differentiated application, a ramified application structure 33 is achieved within application layer 32 on plastic sheeting 31.
In the two embodiment examples shown in Fig. 2 and 3, the binder can be applied over the entire surface or just in the area of the filler structnre.
Depending on the intended purpose, corundwn or silica sand is used as the filler, being used in a proportion of 20 to 70% of the total application weight.
The application weight is appi-oximately 5 to 50 g/m' and the particle size of the filler is 40 to 250 m.
All three embodiments result in a very high coefficient of friction for the plastic sheeting, so it can be used in ntunerous ways.
One possible application is in covering roof surfaces, makinb it possible to walk on them without a danger of slipping.
It is possible here to cover both purely timber boarding as well as viscous surfaces with the plastic sheeting.
These plastic sheetings can also be used very effectively for packaging frozen foods, since the slippage of the normally extremely smooth film packaging is effectively prevented.
It is also possible to coat the base sheeting on both sides, whei-eby various embodiments of the surface layers are possible.
Claims (7)
1. A process for producing a plastic sheeting with a rough surface to increase the coefficient of friction, comprising:
equipping at least one side of the sheeting with a layer (2, 22, 32) which contains the rough surface, wherein at least one of the layers (22, 32) producing the rough surface is applied by coating;
wherein the coating consists of a binder and a filler, and the filler is equipped with a granular structure, and wherein the coating is applied by drawing.
equipping at least one side of the sheeting with a layer (2, 22, 32) which contains the rough surface, wherein at least one of the layers (22, 32) producing the rough surface is applied by coating;
wherein the coating consists of a binder and a filler, and the filler is equipped with a granular structure, and wherein the coating is applied by drawing.
2. A process as claimed in claim 1, wherein the filler consists of corumdum and/or silica sand.
3. The process as claimed in claim 2, wherein the particle size of the filler lies in the range between 40 and 250 µm.
4. The process as claimed in claim 1, wherein the filler is present in a striated structure.
5. The process as claimed in claim 1, wherein the filler is applied in such a manner that it is present on the finished product in a branched, structure.
6. The process as claimed in claim 2, wherein the application weight of the binder with the filler is approximately 5 to 50 g/m2.
7. The process as claimed in claim 1, wherein the proportion of filler is approximately 20 to 70% of the application weight.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19953707.0 | 1999-11-08 | ||
| DE19953707A DE19953707B4 (en) | 1999-11-08 | 1999-11-08 | Process for producing a plastic film |
| CA002390307A CA2390307C (en) | 1999-11-08 | 2000-10-26 | Plastic film |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002390307A Division CA2390307C (en) | 1999-11-08 | 2000-10-26 | Plastic film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2597766A1 CA2597766A1 (en) | 2001-05-17 |
| CA2597766C true CA2597766C (en) | 2009-09-29 |
Family
ID=38663539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002597766A Expired - Lifetime CA2597766C (en) | 1999-11-08 | 2000-10-26 | Plastic film |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2597766C (en) |
-
2000
- 2000-10-26 CA CA002597766A patent/CA2597766C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2597766A1 (en) | 2001-05-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20201026 |