FI20215928A1 - Moldable starch-based composition, molded starch-based article, and methods for production thereof - Google Patents
Moldable starch-based composition, molded starch-based article, and methods for production thereof Download PDFInfo
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- FI20215928A1 FI20215928A1 FI20215928A FI20215928A FI20215928A1 FI 20215928 A1 FI20215928 A1 FI 20215928A1 FI 20215928 A FI20215928 A FI 20215928A FI 20215928 A FI20215928 A FI 20215928A FI 20215928 A1 FI20215928 A1 FI 20215928A1
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- starch
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- moldable
- based composition
- molded
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic System
- C07F9/02—Phosphorus compounds
- C07F9/06—Phosphorus compounds without P—C bonds
- C07F9/08—Esters of oxyacids of phosphorus
- C07F9/09—Esters of phosphoric acids
- C07F9/10—Phosphatides, e.g. lecithin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/10—Metal compounds
- C08K3/105—Compounds containing metals of Groups 1 to 3 or Groups 11 to 13 of the Periodic system
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/092—Polycarboxylic acids
Abstract
A method for producing a moldable starch-based composition is disclosed. A method for making a molded starch-based article is further disclosed. A moldable starch-based composition is also disclosed. Finally, a molded starch-based product formed using the disclosed method or from the disclosed moldable starch-based composition is further disclosed.
Description
MOLDABLE STARCH-BASED COMPOSITION, MOLDED STARCH-BASED
ARTICLE, AND METHODS FOR PRODUCTION THEREOF
The present disclosure relates to a method for producing a moldable starch-based composition. The present disclosure further relates to a method for making a molded starch-based article. Additionally, the present disclosure relates to a moldable starch-based composition. Finally, the present disclosure also relates to a molded starch-based product formed using the disclosed method or from the disclosed moldable starch-based composition.
Plastics are generally used as materials for molded articles such as containers, packaging materials, etc. However, the plastics have several disadvantages which give rise to problems in their waste treatment after use. In such molded plastics: the biodegradability thereof is extremely low; and sometimes a toxic gas is generated when incinerated. Thus, the disposal (burying, incinerating, composting, etc.) of plastics has caused serious social and environmental problems.
A need therefore exists for developing plastics — or similar moldable materials made from or including
S renewable resources to replace the fossil-based re-
N sources that are currently widely used. oS n © 30 SUMMARY
I
E A method for producing a moldable starch-based e composition is disclosed. The method may comprise: 3 a. mixing starch, calcium carbonate, and lecithin in
O water under continuous mixing to form a starch mixture b. heating the starch mixture to 80 °C while mixing the starch mixture to form a processed starch mixture, and c. allowing the processed starch mixture to cool to form a moldable starch-based composition.
A method for producing a molded starch-based article is also disclosed. The method may comprise: d. mixing starch, calcium carbonate, and lecithin in water under continuous mixing to form a starch mixture e. heating the starch mixture to 80 °C while mixing the starch mixture to form a processed starch mixture, f. allowing the processed starch mixture to cool to form a moldable starch-based composition, and g. forming the moldable starch-based composition into a molded article using extrusion molding.
Additionally, a moldable starch-based composition is disclosed. The moldable starch-based composition may comprise 70 - 85 weight-% starch, 2 - 8 weight-% calcium carbonate, 1 — 5 weight-% lecithin, and 7 — 20 welght-% water.
Finally, a molded starch-based product made using the disclosed method is disclosed.
The accompanying drawing, which is included to
N provide a further understanding of the embodiments and
N constitute a part of this specification, illustrates 3 30 various embodiments. In the drawings:
S Fig. 1 presents a schematic representation of = an injection molding apparatus suitable for carrying out
N an embodiment of the method disclosed herein.
N
D
S
A method for producing a moldable starch-based composition is disclosed. The method may comprise: a. mixing starch, calcium carbonate, and lecithin in water under continuous mixing to form a starch mixture b. heating the starch mixture to at least 80 °C while mixing the starch mixture to form a processed starch mixture, c. allowing the processed starch mixture to cool to form a moldable starch-based composition.
In one embodiment, the moldable starch-based composition comprises 70 —- 85 weight-% starch, 2 - 8 weight-% calcium carbonate, 1 - 5 weight-% lecithin, and 7 — 20 weight-% water. In one embodiment, the moldable starch-based composition comprises 75 - 80 weight-% starch, 4 - 6 weight-% calcium carbonate, 2 - 3 weight- % lecithin, and 8 — 15 weight-% water. In one embodiment, the moldable starch-based composition 80 - 83 weight-% starch, 5 - 6 weight-% calcium carbonate, 3 - 4 weight- % lecithin, and 9 - 10 weight-% water.
In one embodiment, in b., the starch mixture is heated to 80 — 110 °C while mixing to form a processed starch mixture. In one embodiment, in b., the starch mixture is heated to 80 — 110 °C for 20 — 60 min while
N mixing to form a processed starch mixture. In one
N embodiment, in b., the starch mixture is heated to 80 - 2 110 °C for approximately 40 min while mixing to form a 2 30 processed starch mixture. In one embodiment, in b., the
I starch mixture is heated to approximately 105 °C for + approximately 40 min while mixing to form a processed & starch mixture. > In one embodiment, the moldable starch-based
O 35 composition is allowed to cool in a porous container.
In certain embodiments, the moldable starch-based composition is allowed to cool in a container made of paper, cardboard, or paperboard. In one embodiment, the moldable starch-based composition is allowed to cool in a paper bag.
A method for producing a molded starch-based article is disclosed. The method may comprise: a. mixing starch, calcium carbonate, and lecithin in water under continuous mixing to form a starch mixture b. heating the starch mixture to at least 80 °C while mixing the starch mixture to form a processed starch mixture, c. allowing the processed starch mixture to cool to form a moldable starch-based composition, and d. forming the moldable starch-based composition into a molded article using extrusion molding.
In one embodiment, in b., the starch mixture is heated to 80 — 110 °C while mixing to form a processed starch mixture. In one embodiment, in b., the starch mixture is heated to 80 — 110 °C for 20 — 60 min while mixing to form a processed starch mixture. In one embodiment, in b., the starch mixture is heated to 80 - 110 °C for approximately 40 min while mixing to form a processed starch mixture. In one embodiment, in b., the starch mixture is heated to approximately 105 °C for — approximately 40 min while mixing to form a processed
O starch mixture. & In one embodiment, the molded starch-based = 30 article may be formed from a moldable starch-based 9 composition prepared according to the method disclose
E: herein by forming the moldable starch-based composition 2 into a molded article using extrusion molding. 3 In one embodiment, the molded starch-based
N 35 article is formed from a moldable starch-based
N composition formed according to the present disclosure.
In one embodiment, the moldable starch-based composition comprises 70 —- 85 weight-% starch, 2 - 8 weight-% calcium carbonate, 1 — 5 weight-% lecithin, and 7 — 20 weight-% water. In one embodiment, the moldable 5 starch-based composition comprises 75 - 80 weight-% starch, 4 - 6 weight-% calcium carbonate, 2 - 3 weight- % lecithin, and 8 — 15 weight-% water. In one embodiment, the moldable starch-based composition 80 - 83 weight-% starch, 5 - 6 weight-% calcium carbonate, 3 - 4 weight- % lecithin, and 9 - 10 weight-% water.
As used herein, the term “plastic composition” refers to any composition whose plasticity makes it possible for it to be molded, extruded or pressed into solid objects of various shapes. As used herein, "plastic composition” may refer to composition based both on fossil fuel-based chemicals or chemicals from renewable resources.
As used herein, the term "moldable” refers to a composition that may be molded into a shape and will, on cooling or setting, retain the shape into which it has been molded. A non-limiting example of a moldable composition is a thermoset plastic material that may be softened or melted by heating, formed into any shape when molten, and will set into the shape when allowed to cool.
In one embodiment, an article formed from the — moldable starch-based composition of the present
O disclosure or a starch-based molded article according o to the present disclosure is biodegradable. In one = 30 embodiment, the moldable starch-based composition
S according to the present disclosure is biodegradable.
E In one embodiment, the starch is corn starch,
D rice starch, wheat starch, cassava starch, potato
D starch, or any combination thereof. In one embodiment, 3 35 the starch is potato starch.
In one embodiment, a starch-based molded article may be formed from a moldable composition comprising starch using any method suited for molding plastic. In certain embodiments, the starch-based molded article may be formed from a moldable composition comprising starch using injection molding, extrusion molding, blow molding, compression molding, or any combination thereof. In one embodiment, a starch-based molded article may be formed from a moldable starch- based composition using injection molding.
In one embodiment, the molded starch-based article is formed by extrusion molding. In one embodiment, the extrusion molding is performed using a screw extruder to feed the moldable material into the mold.
In one embodiment, the molded starch-based article is formed by extruding the moldable starch-based composition into a mold, the molding pressure is maintained for 1 second, and the article allowed to cool for 20 seconds before removal from the mold.
An apparatus for forming a molded starch-based article from the moldable starch-based composition is disclosed herein. As will be readily apparent to a person skilled in the art, a molded starch-based article according to the present disclosure may be form using most apparatuses suited for forming molded plastic — articles.
O In one embodiment, the apparatus may for o forming a molded starch-based article may be an = 30 injection molding apparatus. In one embodiment, the 9 screw feeder in the injection-molding apparatus will be
E: configured to have difference temperatures in different e sections of the screw. > A moldable composition comprising starch is
N 35 disclosed herein. In one embodiment, the composition
N comprising starch comprises 70 - 85 weight-% starch, 2
- 8 weight-% calcium carbonate, 1 - 5 weight-% lecithin, and 7 — 20 weight-% water. In one embodiment, the composition comprising starch comprises 75 — 80 weight- 3 starch, 4 — 6 weight-% calcium carbonate, 2 — 3 weight- % lecithin, and 8 — 15 weight-% water. In one embodiment, the composition comprising starch comprises 80 - 83 weight-% starch, 5 - 6 weight-% calcium carbonate, 3 - 4 weight-% lecithin, and 9 - 10 weight-% water.
A molded starch-based article formed using the above method or from the moldable starch-based composition above is disclosed. The molded starch-based article may be any article that can be formed using extrusion molding or a similar technigue.
In one embodiment, a molded starch-based product according to the present disclosure is completely biodegradable.
A molded starch-based article according to the present disclosure may be formed using an injection molding apparatus. A schematic representation of one embodiment of a suitable apparatus is presented in Fig. 1. In Fig. 1, 1 represent a barrel with heating elements, 2 represents the injection nozzle, 3 represents the screw feeder, 4 represents the machinery for operating the screw, and 5 represent the funnel feeding material to the screw including heating elements. In Fig. 1, roman numerals I - IV represent heating zones that may — be maintained at different temperatures during the
O process. & In one embodiment, a moldable starch-based = 30 composition according to the present disclosure is 9 molded into a molded starch-based article using an
E injection molding apparatus. The moldable starch-based
O composition according to the present disclosure is fed 2 into funnel 1 of an injection molding apparatus, the
N 35 temperature of the funnel is 40 °C, the temperature of
N the first zone I of the extrusion screw is 60 °C, the temperature of the second zone II of the extrusion screw is 90 °C, the temperature of the third zone III of the extrusion screw is 140 — 170 °C, the temperature of the fourth zone IV of the extrusion screw is 135 -— 170 °C, and the temperature of the extrusion nozzle 2 is 135 - 150 °c.
In one embodiment, the extrusion speed is 59 cm? per second.
In one embodiment, the molded starch-based article is formed by extruding the moldable starch-based composition into a mold, the molding pressure is maintained for 1 second, and the article allowed to cool for 20 seconds before removal from the mold.
The method for forming a starch-based moldable composition described in the current specification has the added utility of providing a simple way to produce a starch-based moldable composition from cheap and readily available raw materials to form a moldable composition that can be molded into the desired shape using existing machinery. The molded starch-based articles described in the current specification have the added utility of being cheap to produce from renewable sources and completely biodegradable.
The method for forming a starch-based molded article described in the current specification has the added utility of simplifying the production process by allowing the moldable starch-based composition to be
N directly formed into the article using conventional
N methods. This enables direct molding of the article from
P 30 the starch-based composition without the need for
S additional intermediate process steps. i © EXAMPLES
D Reference will now be made in detail to various
N 35 embodiments.
N The description below discloses some embodiments in such a detail that a person skilled in the art is able to utilize the embodiments based on the disclosure. Not all steps or features of the embodiments are discussed in detail, as many of the steps or features will be obvious for the person skilled in the art based on this specification.
Example 1 1000 g of potato starch, 57.75 g of lecithin, 75.75 g calcium carbonate, and 122.5 g water were mixed thoroughly at room temperature (approximately 20 °C).
The formed mixture was heated to approximately 80 °C and maintained at this temperature for 20 minutes under continuous mixing.
Finally, the formed mixture was transferred to a porous paper bag and allowed to cool to room temperature (approximately 20 °C). The cooled mixture may be used for injection molding to form molded articles.
Example 2
The moldable starch based composition formed in Example 1 was formed into a molded article using an injection molding apparatus.
The temperature of the funnel 5 feeding the moldable starch based composition into the screw 3 was
N 40 °C, the temperature of the first zone I of the
N extrusion screw was 60 °C, the temperature of the second 3 30 zone II of the extrusion screw was 90 °C, the temperature 2 of the third zone III of the extrusion screw was 140 -
Ek 170 °C, the temperature of the fourth zone IV of the > extrusion screw was 135 —- 170 °C, and the temperature & of the extrusion nozzle 2 is 135 — 150 °C. = 35 The extrusion speed was 59 cm? per second and
S the pressure at the nozzle approximately 1660 bar.
The moldable starch-based composition was extruded into a mold, the molding pressure maintained for 1 second, and the article allowed to cool for 20 seconds before removal from the mold.
It is obvious to a person skilled in the art that with the advancement of technology, the basic idea may be implemented in various ways. The embodiments are thus not limited to the examples described above; instead they may vary within the scope of the claims.
The embodiments described hereinbefore may be used in any combination with each other. Several of the embodiments may be combined together to form a further embodiment. A method, a composition, or a product, disclosed herein, may comprise at least one of the embodiments described hereinbefore. It will be understood that the benefits and advantages described above may relate to one embodiment or may relate to several embodiments. The embodiments are not limited to those that solve any or all of the stated problems or those that have any or all of the stated benefits and advantages. It will further be understood that reference to 'an' item refers to one or more of those items. The term "comprising” is used in this specification to mean including the feature(s) or act(s) followed thereafter, without excluding the presence of one or more additional features or acts.
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Claims (14)
1. Method for producing a moldable starch-based composition, wherein the method comprises a. mixing starch, calcium carbonate, and lecithin in water under continuous mixing to form a starch mixture b. heating the starch mixture to at least 80 °C while mixing the starch mixture to form a processed starch mixture, and c. allowing the processed starch mixture to cool to form a moldable starch-based composition.
2. Method for producing a molded starch-based article, wherein the method comprises a. mixing starch, calcium carbonate, and lecithin in water under continuous mixing to form a starch mixture b. heating the starch mixture to at least 80 °C while mixing the starch mixture to form a processed starch mixture,
c. allowing the processed starch mixture to cool to form a moldable starch-based composition, and d. forming the moldable starch-based composition into a molded article using extrusion molding.
3. The method of any of the preceding claims, wherein starch mixture is heated to 80 - 110 °C while mixing the starch mixture to form a processed starch mixture
— 4. The method of any of the preceding claims, wherein S the moldable starch-based composition comprises 70 - N 85 weight-% starch, 2 - 8 weight-% calcium carbonate, = 30 1- 5 weight-% lecithin, and 7 - 20 weight-% water.
© 5. The method of any of the preceding claims, wherein E the moldable starch-based composition comprises 75 — © 80 weight-% starch, 4 - 6 weight-% calcium carbonate, & 2 -— 3 weight-% lecithin, and 8 — 15 weight-% water. N 35 6. The method of any of the preceding claims, wherein N the moldable starch-based composition comprises 80 -
83 weight-% starch, 5 - 6 weight-% calcium carbonate, 3 - 4 weight-% lecithin, and 9 - 10 weight-% water.
7. The method of any of the preceding claims, wherein the starch is potato starch.
8. The method of any of claims 2 — 6, wherein the molded starch-based article is formed by injection molding.
9. The method of any of claims 2 — 7, wherein the molded starch-based article is formed by extruding the moldable starch-based composition into a mold, the molding pressure is maintained for 1 second, and the article allowed to cool for 20 seconds before removal from the mold
10. A moldable starch-based composition comprising 70 - 85 weight-% starch, 2 - 8 weight-% calcium carbonate, 1 —- 5 weight-% lecithin, and 7 — 20 weight- % water.
11. The moldable starch-based composition of claim 10, wherein the moldable starch-based composition comprises 75 - 80 weight-% starch, 4 - 6 weight-% calcium carbonate, 2 - 3 weight-% lecithin, and 8 - 15 weight-% water.
12. The moldable starch-based composition of any of claims 10 - 11, wherein the moldable starch-based composition comprises 80 - 83 weight-% starch, 5 - 6 weight-% calcium carbonate, 3 - 4 weight-% lecithin, and 9 - 10 weight-% water.
13. A molded starch-based product formed using the N method of any of claims 1 - 9 or from the moldable N starch-based composition of claims 10 - 12. 3 30
14. The molded starch-based product of claim 13, 2 wherein the product is completely biodegradable. = a N D S
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20215928A FI20215928A1 (en) | 2021-09-03 | 2021-09-03 | Moldable starch-based composition, molded starch-based article, and methods for production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20215928A FI20215928A1 (en) | 2021-09-03 | 2021-09-03 | Moldable starch-based composition, molded starch-based article, and methods for production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FI20215928A1 true FI20215928A1 (en) | 2023-03-04 |
Family
ID=85380762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI20215928A FI20215928A1 (en) | 2021-09-03 | 2021-09-03 | Moldable starch-based composition, molded starch-based article, and methods for production thereof |
Country Status (1)
| Country | Link |
|---|---|
| FI (1) | FI20215928A1 (en) |
-
2021
- 2021-09-03 FI FI20215928A patent/FI20215928A1/en unknown
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