CA2305126A1 - Blind slat having imitation wood grain and method for making same - Google Patents
Blind slat having imitation wood grain and method for making same Download PDFInfo
- Publication number
- CA2305126A1 CA2305126A1 CA002305126A CA2305126A CA2305126A1 CA 2305126 A1 CA2305126 A1 CA 2305126A1 CA 002305126 A CA002305126 A CA 002305126A CA 2305126 A CA2305126 A CA 2305126A CA 2305126 A1 CA2305126 A1 CA 2305126A1
- Authority
- CA
- Canada
- Prior art keywords
- natural fiber
- composite material
- blind slat
- plastic
- plastic material
- 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
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/28—Moulding or pressing characterised by using extrusion presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C5/00—Processes for producing special ornamental bodies
- B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
- B44C5/0453—Ornamental plaques, e.g. decorative panels, decorative veneers produced by processes involving moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44F—SPECIAL DESIGNS OR PICTURES
- B44F9/00—Designs imitating natural patterns
- B44F9/02—Designs imitating natural patterns wood grain effects
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B9/26—Lamellar or like blinds, e.g. venetian blinds
- E06B9/38—Other details
- E06B9/386—Details of lamellae
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
- B29K2711/14—Wood, e.g. woodboard or fibreboard
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A blind slat is made by a method involving the formation of a composite material by mixing a plastic material and a natural fiber in a mixing machine. The composite material is treated in a process machine to become a molten composite material of which the blind slat is formed by extrusion. The blind slat so made has imitation wood grains.
Description
BLIND SLAT HAVING IMITATION WOOD GRAIN AND
METHOD FOR MAKING SAME
FIELD OF THE INVENTION
The present invention relates generally to a blind slat having an imitation wood grain, and more particularly to a method for making the blind slat having an imitation wood grain.
BACKGROUND OF THE INVENTION
The conventional blind slats are generally made of a plastic material, aluminium material, or wooden material. The plastic blind slat has an excellent quality of pliability. The aluminium blind slat has a relatively strong mechanical strength. The wooden blind slat has a natural appearance of wood grain. In light of the plastic blind slat being pliable, the plastic blind slat can be made more appealing to the consumer at large by providing the plastic blind slat with an added quality of wooden appearance.
There are certain conventional plastic blind slats which are provided with an imitation wood grain. The quality of the wooden appearance of the conventional plastic blind slats depends on the nature of the method by which the conventional plastic blind slats are made. For example some of the conventional plastic blind slats are made of at least two kinds of the plastic materials which are different in melting point and color. The slats are made by injection molding and are devoid of imitation wood grains of natural appearance. Another method involves the use of a skin of imitation wood grain, which is attached to the blind slat at an additional labor cost. In addition, the surface of the blind slat is apt to form air bubble in the midst of the attaching of the skin to the surface of the blind slat. Moreover, the edge of the skin which is attached to the blind slat is apt to warp due to contraction in drying. There is a method by which the plastic blind slat is made of a plastic material and wood sawdust which is added at the time when the plastic material is being melted. The addition of the wood sawdust may enhance the mechanical strength of the blind slat; nevertheless it has a little effect on providing the blind slat with an appearance of the imitation wood grain.
SUMMARY OF THE INVENTION
It is the primary objective of the present invention to provide a blind slat having an imitation wood grain.
It is another objective of the present invention to provide a method for making the blind slat having an imitation wood grain.
It is still another objective of the present invention to provide a method for making the blind slat of a recycled material and having an imitation wood grain.
In keeping with the principle of the present invention, the foregoing objectives of the present invention are attained by a method for making a blind slat which is provided with a wooden appearance. The blind slat is made of a composite material formed of a plastic material and a natural fiber material. The method involves the controlling of the moisture content of the natural fiber material, or the controlling of the degree of coupling and the degree of cross-linking between the plastic material and the natural fiber material, so as to influence the extent of foaming of the composite material in the process.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a process flow chart of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
As illustrated in FIG. 1, a method embodied in the present invention involves the use of a plastic material 10 and a natural fiber 20, which are mixed together by a control process 30 to form a composite material 40. The control process 30 of the method of the present invention involves the precision control of the moisture content of the natural fiber 20 in conjunction with the application of an additive 31.
Alternatively, the control process 30 may involves the precision control of the coupling and the cross-linking of the plastic material 10 and the natural fiber 20, so as to influence the foaming of the composite material 40 in the production process, which is carried out by a process machine 50. A blind slat 60 of the present invention is formed by extrusion. The -, J
. CA 02305126 2000-04-14 blind slat 60 has an imitation wood grain.
The plastic material 10 is a thermoplastic plastic material, such as polyvinyl chloride resin, polyacrylic resin, polyethylene resin, polyurethane resin, polystyrene resin, etc. The natural fiber material 20 is obtained from the discarded articles containing the natural fibers, such as wood sawdust, waste paper, coconut shell, sugar cane dregs. The additive 31 is a coupling agent, a cross-linking agent, an interfacial agent, or a plastic additive.
The natural fiber 20 is granular and has a diameter ranging between 20 microns and 3mm. The moisture content of the natural fiber 20 should not exceed 10%. The preferred content of moisture of the natural fiber 20 ranges between 0. I % and 10%. The excessive moisture content of the natural fiber 20 has a negative impact on the production process.
The plastic material 10 and the natural fiber 20 are mixed by a mixing machine in a ratio ranging between 99:1 and 30:70. The ratio of the natural fiber 20 should not exceed 70 so as to ensure that the blind slat 60 has an appropriate rigidity. The mixing machine is provided with a temperature controller which is intended to control the temperature of the mixing machine in which the plastic material 10 and the natural fiber 20 are mixed. An appropriate moisture content of the natural fiber 20 promotes the combination of the plastic material 10 and the natural fiber 20 in the presence of the additive 31 which is introduced into the mixing machine at an appropriate time. The composite material 40 is thus produced.
The composite material 40 is transferred to a process machine 50 in which the composite material 40 is melted such that the molten composite material is forced through a channel of an extrusion molding tool, thereby resulting in the formation of the blind slat 60 having an imitation wood grain, a predetermined size, and a predetermined thickness. The channel of the extrusion molding tool is optionally provided with a spoiler which serves to break up the flow of the molten composite material so as to enable the blind slat 60 to have annual rings which are formed by the imitation wood grains.
In light of the water of the natural fiber 20 serving as a carrier, solvent, or promoter of the additive 31, the moisture content of the natural fiber 20 is a crucial factor.
METHOD FOR MAKING SAME
FIELD OF THE INVENTION
The present invention relates generally to a blind slat having an imitation wood grain, and more particularly to a method for making the blind slat having an imitation wood grain.
BACKGROUND OF THE INVENTION
The conventional blind slats are generally made of a plastic material, aluminium material, or wooden material. The plastic blind slat has an excellent quality of pliability. The aluminium blind slat has a relatively strong mechanical strength. The wooden blind slat has a natural appearance of wood grain. In light of the plastic blind slat being pliable, the plastic blind slat can be made more appealing to the consumer at large by providing the plastic blind slat with an added quality of wooden appearance.
There are certain conventional plastic blind slats which are provided with an imitation wood grain. The quality of the wooden appearance of the conventional plastic blind slats depends on the nature of the method by which the conventional plastic blind slats are made. For example some of the conventional plastic blind slats are made of at least two kinds of the plastic materials which are different in melting point and color. The slats are made by injection molding and are devoid of imitation wood grains of natural appearance. Another method involves the use of a skin of imitation wood grain, which is attached to the blind slat at an additional labor cost. In addition, the surface of the blind slat is apt to form air bubble in the midst of the attaching of the skin to the surface of the blind slat. Moreover, the edge of the skin which is attached to the blind slat is apt to warp due to contraction in drying. There is a method by which the plastic blind slat is made of a plastic material and wood sawdust which is added at the time when the plastic material is being melted. The addition of the wood sawdust may enhance the mechanical strength of the blind slat; nevertheless it has a little effect on providing the blind slat with an appearance of the imitation wood grain.
SUMMARY OF THE INVENTION
It is the primary objective of the present invention to provide a blind slat having an imitation wood grain.
It is another objective of the present invention to provide a method for making the blind slat having an imitation wood grain.
It is still another objective of the present invention to provide a method for making the blind slat of a recycled material and having an imitation wood grain.
In keeping with the principle of the present invention, the foregoing objectives of the present invention are attained by a method for making a blind slat which is provided with a wooden appearance. The blind slat is made of a composite material formed of a plastic material and a natural fiber material. The method involves the controlling of the moisture content of the natural fiber material, or the controlling of the degree of coupling and the degree of cross-linking between the plastic material and the natural fiber material, so as to influence the extent of foaming of the composite material in the process.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a process flow chart of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
As illustrated in FIG. 1, a method embodied in the present invention involves the use of a plastic material 10 and a natural fiber 20, which are mixed together by a control process 30 to form a composite material 40. The control process 30 of the method of the present invention involves the precision control of the moisture content of the natural fiber 20 in conjunction with the application of an additive 31.
Alternatively, the control process 30 may involves the precision control of the coupling and the cross-linking of the plastic material 10 and the natural fiber 20, so as to influence the foaming of the composite material 40 in the production process, which is carried out by a process machine 50. A blind slat 60 of the present invention is formed by extrusion. The -, J
. CA 02305126 2000-04-14 blind slat 60 has an imitation wood grain.
The plastic material 10 is a thermoplastic plastic material, such as polyvinyl chloride resin, polyacrylic resin, polyethylene resin, polyurethane resin, polystyrene resin, etc. The natural fiber material 20 is obtained from the discarded articles containing the natural fibers, such as wood sawdust, waste paper, coconut shell, sugar cane dregs. The additive 31 is a coupling agent, a cross-linking agent, an interfacial agent, or a plastic additive.
The natural fiber 20 is granular and has a diameter ranging between 20 microns and 3mm. The moisture content of the natural fiber 20 should not exceed 10%. The preferred content of moisture of the natural fiber 20 ranges between 0. I % and 10%. The excessive moisture content of the natural fiber 20 has a negative impact on the production process.
The plastic material 10 and the natural fiber 20 are mixed by a mixing machine in a ratio ranging between 99:1 and 30:70. The ratio of the natural fiber 20 should not exceed 70 so as to ensure that the blind slat 60 has an appropriate rigidity. The mixing machine is provided with a temperature controller which is intended to control the temperature of the mixing machine in which the plastic material 10 and the natural fiber 20 are mixed. An appropriate moisture content of the natural fiber 20 promotes the combination of the plastic material 10 and the natural fiber 20 in the presence of the additive 31 which is introduced into the mixing machine at an appropriate time. The composite material 40 is thus produced.
The composite material 40 is transferred to a process machine 50 in which the composite material 40 is melted such that the molten composite material is forced through a channel of an extrusion molding tool, thereby resulting in the formation of the blind slat 60 having an imitation wood grain, a predetermined size, and a predetermined thickness. The channel of the extrusion molding tool is optionally provided with a spoiler which serves to break up the flow of the molten composite material so as to enable the blind slat 60 to have annual rings which are formed by the imitation wood grains.
In light of the water of the natural fiber 20 serving as a carrier, solvent, or promoter of the additive 31, the moisture content of the natural fiber 20 is a crucial factor.
Claims (9)
1. A blind slat having imitation wood grains and made of a plastic material and a natural fiber.
2. A method for making the blind slat as defined in claim 1, said method comprising the steps of:
(a) preparing a predetermined quantity of a plastic material and a predetermined quantity of a natural fiber in granular form and having a moisture content;
(b) mixing the plastic material and the natural fiber in a mixing machine to form a composite material;
(c) melting the composite material in a process machine such that the composite material becomes a molten composite material; and (d) forcing the molten composite material through a channel of an extrusion molding machine, thereby resulting in formation of the blind slat having imitation wood grains.
(a) preparing a predetermined quantity of a plastic material and a predetermined quantity of a natural fiber in granular form and having a moisture content;
(b) mixing the plastic material and the natural fiber in a mixing machine to form a composite material;
(c) melting the composite material in a process machine such that the composite material becomes a molten composite material; and (d) forcing the molten composite material through a channel of an extrusion molding machine, thereby resulting in formation of the blind slat having imitation wood grains.
3. The method as defined in claim 2, wherein said plastic material is a thermoplastic plastic; and wherein said natural fiber is obtained from a discarded article containing natural fiber.
4. The method as defined in claim 2, wherein said granular natural fiber has a diameter ranging between 20 microns and 3mm.
5. The method as defined in claim 2, wherein the moisture content of said natural fiber ranges between 0.1% and 10%.
6. The method as defined in claim 2, wherein said composite material contains said plastic material and said natural fiber in a ratio ranging between 99:1 and 30:70.
7. The method as defined in claim 2, wherein said mixing machine is provided with a temperature controller to control the temperature of said mixing machine in which said plastic material and said natural fiber are mixed whereby said mixing machine is provided with an additive injected thereinto.
8. The method as defined in claim 7, wherein said additive is a coupling agent, a cross-linking agent, an interfacial agent, or a plastic additive.
9. The method as defined in claim 2, wherein said channel of said extrusion molding machine is provided with a spoiler serving to break up the flow of said molten composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002305126A CA2305126A1 (en) | 2000-04-14 | 2000-04-14 | Blind slat having imitation wood grain and method for making same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002305126A CA2305126A1 (en) | 2000-04-14 | 2000-04-14 | Blind slat having imitation wood grain and method for making same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2305126A1 true CA2305126A1 (en) | 2001-10-14 |
Family
ID=4165892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002305126A Abandoned CA2305126A1 (en) | 2000-04-14 | 2000-04-14 | Blind slat having imitation wood grain and method for making same |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2305126A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2407061B (en) * | 2003-10-15 | 2007-12-12 | Conenor Oy | Method of manufacturing a composite product and composite product |
-
2000
- 2000-04-14 CA CA002305126A patent/CA2305126A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2407061B (en) * | 2003-10-15 | 2007-12-12 | Conenor Oy | Method of manufacturing a composite product and composite product |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20040414 |