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WO2002020666A2 - Procede de fabrication de produits moulables et moule conçu pour ce procede - Google Patents

Procede de fabrication de produits moulables et moule conçu pour ce procede Download PDF

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Publication number
WO2002020666A2
WO2002020666A2 PCT/SG2001/000179 SG0100179W WO0220666A2 WO 2002020666 A2 WO2002020666 A2 WO 2002020666A2 SG 0100179 W SG0100179 W SG 0100179W WO 0220666 A2 WO0220666 A2 WO 0220666A2
Authority
WO
WIPO (PCT)
Prior art keywords
mould
mixture
process according
range
pressure
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.)
Ceased
Application number
PCT/SG2001/000179
Other languages
English (en)
Other versions
WO2002020666A3 (fr
Inventor
Thiam Huay Gary Choo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CA002427530A priority Critical patent/CA2427530A1/fr
Priority to AU2001290490A priority patent/AU2001290490A1/en
Priority to EP01970490A priority patent/EP1332180A2/fr
Priority to JP2002525677A priority patent/JP2004508229A/ja
Publication of WO2002020666A2 publication Critical patent/WO2002020666A2/fr
Publication of WO2002020666A3 publication Critical patent/WO2002020666A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
    • 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
    • B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
    • 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
    • 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
    • B27N5/00—Manufacture of non-flat articles
    • 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
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse

Definitions

  • the invention relates to a process for manufacture of mouldable products and a mould for use with this process. More particularly, this invention relates to a process and to a mould for manufacturing products from plant fibers.
  • a product made using the process or mould of the invention may be of any convenient shape and may optionally include partitions or protrusions.
  • Plastics materials do not degrade and cannot be disposed of effectively. Such materials may be collected and often recycled. However, recycling does not completely solve the environmental problems posed by many plastics because the breakdown of these compounds releases harmful gases into the atmosphere. Plastics products which are not recycled may lead to land and water pollution causing irreparable damage to the environment. Wood-based products, such as paper boxes and paper pulp packaging, lead to deforestation. Whilst disposal of paper products may not have a direct harmful effect on the environment, deforestation resulting from the need for wood chips for paper products causes ozone layer depletion which is equally harmful to the environment. Reforestation takes at least 15 years and the harmful ecological impact during the recovery period may not be remedied, even over an extended period of time. Further, some paper products, such as paper cups, have a coating that is non-biodegradable which can cause further ecological harm.
  • chipboard or particle board uses a compression method and adhesives. However it is not convenient to produce shaped articles from chipboard.
  • thermo-foaming There is a process that uses a biodegradable material such as plant fibers to form products by thermo-foaming.
  • steam is used to cook the raw materials, mainly starch, so that the starch can expand and bind with the next molecule of starch.
  • the starch As the starch is heated in the presence of moisture, it expands and creates a multitude of small air pockets in the product.
  • This product mainly consists of starch therefore the product degrades or disintegrates very quickly when it contacts a liquid such as water. As a result, the product cannot be coated with a water-proofing material since it starts to degrade once it contacts the liquid.
  • thermo-foaming process relies on foam formation of the material to shape the material into receptacles. Such shaped products are soft and "cushion-like" and so will not be durable and strong enough to withstand hard knocks. As a result, the products which can be made via this process are limited. Another issue with this process is the cost of production. The methodology used is very costly and the limited uses does not provide the volume of production to make the production line cost effective.
  • the process further comprises the steps of:
  • the invention involves employing the action of the steam to force the mixture to be distributed throughout the mould. Any excess solids material will thus be forced out of the mould by the action of the steam. Once the action of the steam has spread the mixture throughout the mould, the steam is removed or escapes through the gap or a valve. Without this steam action, the solids in the mixture would not spread throughout the mould and would end up being compressed at the bottom of the mould in which case the mixture would no longer be in a readily mouldable state.
  • the process comprises a further step of trimming the edges of the product prior to coating the product in step (h).
  • trimming is conducted using a die-cut machine.
  • Other methods for trimming may also be used within the scope of the invention including polishing and/or sanding down the edges of the product.
  • the main component of the mixture is plant fibers which are bonded together by an adhesive which hardens as it cures, the cured product will not disintegrate immediately upon contact with liquid.
  • the product will take a minimum often minutes before it starts disintegrating and could last as long as one hour.
  • the density of the product is dependent on the pressure applied during formation of the product. Therefore, the product is liquid-resistant enough to withstand treatment with water-resistance agents or decorative materials.
  • the cured product can be further treated with a water resistance material or decorative materials.
  • the period of time for which pressure in the range of from 1000 to 7000 PSI is applied in step (c) is preferably in the range of from 3 to 10 seconds.
  • the mixture in the mould is subjected to a temperature of about 29 °C.
  • the pressure in step (d) is reduced to a pressure in the range of from 500 to 1500 PSI before pressure is increased in step (e).
  • the pressure in step (d) is reduced to atmospheric and then increased in step (e) to a pressure in the range of from 500 to 1500 PSI more preferably about 1000 PSI.
  • the temperature in step (e) is increased to about 140°C.
  • Step (f) typically occurs for a period of time in the range of from 10 seconds to 30 minutes or longer till the product is dry at a temperature in the range of from 100°C to 250°C.
  • the plant fibers can come from any source.
  • suitable plant fibres may be chosen from the group comprising rice stalks, wheat stalks, sugar cane, corn leaves, banana leaves, corn crops, roots, grass, flowers, recycled paper or combinations thereof.
  • the size of the fibers affects the texture of the final product.
  • the requirements of the final product will dictate the size of the fibers required.
  • a table top will need to be strong and is flat so this will allow larger longer pieces of fiber to be used than those used in a smaller or curved item such as a cup.
  • the plant fiber pieces used in the composition and process are in the range from OJmm to 5 mm. More preferably, the length should between 1 mm to 2 mm. However it is possible to use plant fibers which have been ground smaller than 1 mm, eg. powdered.
  • the binding agents or adhesives which are used to bind the fibres are water soluble and preferably are environmental friendly. It is preferred that non-biodegradable plastics or synthetic polymers are not used so that the process provides a biodegradable product although it is to be appreciated that biodegradability of the binding agents or adhesives is not essential where the end product does not need to be biodegradable.
  • water based biodegradable adhesives are used so that the end product is biodegradable.
  • latex-based adhesives such as Neoprene, are used in accordance with the invention.
  • any added starch used in accordance with the present invention is selected from the group comprising tapioca flour, ground sweet potatoes or any other root powder, corn starch, flour and combinations thereof. While corn starch and flour are suitable for use as added starch in accordance with the present invention the results are not as good as when other starch sources are used. There is no need to modify the added starch prior to processing.
  • step (a)(i) The fiber and flour or other added starch are mixed together initially in step (a)(i) to produce an even mixture. Further, if the liquid ingredients contact the flour before it is evenly mixed in, the flour will form lumps and this will create holes in the product as the starch is removed during the process.
  • step (b) the mixture is stored in a sealed container until required for step (b) to prevent the mixture from drying out.
  • the mixture is preferably stored at room temperature prior to use to prevent hardening.
  • the mixture may be stored at a temperature in the range from the freezing point of the mixture to about 25°C.
  • the mixture is stored at a temperature in the range from 15 to 25°C.
  • step (a) occurs at a temperature at or below 25 °C.
  • the water used can be of any quality.
  • the water quality chosen will depend on the intended use for the product. For example, non-potable water such as sea water may be used as well as normal utility water. However, products intended for food contact must be made from drinking quality water.
  • the water is converted to steam during the process. This aids in spreading the mixture evenly in the mould. The mixture does not foam because the pressure prevents the mixture from expanding, and the action of the steam is directed towards spreading the mixture throughout the mould. Once the spreading is complete, the steam is removed to allow the product to dry.
  • the amount of pressure applied to the mould will affect the density of the final product. The denser the product, the harder it is. Therefore, if a more flexible product is desired then a lower pressure should be used.
  • the pressure is applied to the mould, any excess material will be squeezed out of the mould.
  • the pressure is at about 4000 PSI.
  • the strength of the product produced by the process of the present invention will depend on four factors:
  • the type of adhesive including the crystallization rates and viscosity of the adhesive.
  • Different types and grades of adhesive contribute differently to the strength of the products. Different crystallization rates and viscosities of different adhesives result in different products. Crystallization determines the rate of initial strength development. The faster the rate of crystallization, the faster the rate of strength development. Viscosity influences the inherent strength of the adhesive film, the solution viscosity, and solids content. The higher the polymer viscosity, or the higher the molecular weight, the higher the film strength, the higher the adhesive viscosity, or the lower the solids at a given adhesive viscosity.
  • the product design may enhance the strength of the overall product. For example, a box with ribs will be stronger than one without.
  • sugar cane fibre provides a moulded product that is inherently resilient but not brittle.
  • rice husks tend to provide a product that is hard, but comparatively brittle.
  • Products produced by the process of the invention can be recycled with very minimal loss of original material and with no harmful by-products. In other words, a product can be recycled to produce an almost identical product.
  • the plant fibers used in the process of the present invention may be obtained from the unwanted parts of crops such as rice-stalks, sugar cane pulps or any other fibers that are not directly consumed. This helps to dispose of such waste from harvesting sites, factories etc. which would otherwise be disposed of by burning and thus causing air pollution. The use of such raw material helps to reduce this air pollution.
  • bacteria are killed due to the high temperatures being applied.
  • the present invention relates to biodegradable as well as non-biodegradable materials. Since the manufacture of products from biodegradable materials requires that steam be able to escape from the mould, the use of biodegradable materials to produce large objects, such as table tops, has not been viable due to the extended drying time required for such large objects. As a result, investigations were made into developing a mould appropriate for such large products.
  • a mould for use with the process of the present invention comprising one or more valves in the top and/or bottom ends of the top and/or bottom parts of the mould to enable steam to be removed wherein the openable valves are closed when the mixture is placed into the mould and then the valves open when the steam needs to be removed.
  • valves are closed while the mixture is poured into the mould in step (b) and during the application of pressure to the mould in step (c).
  • the mould of the present invention may be used to manufacture a moulded product using a moulding mixture comprising;
  • the mould of the present invention may be used to manufacture a moulded product using a moulding mixture comprising;
  • the mould of the present invention may be used to manufacture a moulded product using a moulding mixture comprising; (i) 40 to 60 wt% plant fibre, optionally combined with 2 to 10 wt% added starch; and
  • the mould consists of at least two parts - a top and a bottom part and is typically made of metal. However, it is possible to use moulds which come in three or more parts provided that there is still a top and a bottom part, hi use, the mould is preferably compressed vertically, that is, in a downward and upward manner so that the top part is compressed against the bottom part. Typically, there is a gap of 1 mm between the top and bottom mould parts through which the steam and excess mixture can escape.
  • the surface of the mould is preferably smooth, that is the surface is not rough or feels like sand paper. If desired a pattern may be engraved into the mould. Any protrusions in the mould must not interfere with the removal of the product from the mould.
  • the shape and size of the mould will depend on the product to be produced.
  • the mould may be heated by attaching heaters to the mould or passing the mould through an oven.
  • the pressure may be provided by any known means including a hydraulic press, pneumatic press or mechanical press. Typically, the pressure is provided by a hydraulic press as these presses provide a consistent pressure.
  • valves enable the steam to be removed from the mould so that the product will dry out faster. Further, the steam is removed more quickly and the product is less likely to be burnt.
  • valves are mechanically operated. Once the temperature in the mould has risen above the boiling point of the water, this indicates that mixture will be spread evenly throughout the mould and the valves can be opened to release the steam. By the time that the mixture has spread evenly throughout the mould, it will have hardened just enough so that it does not enter into the valve with the steam.
  • the valves are closed when the mixture is placed into the mould and when the pressure is applied to the mould, thus the mould is totally closed except the gap between the top and bottom parts of the mould. As the water or moisture in the mixture is converted into steam, this steam will rush upward forcing the mixture to move into all the open spaces thus filling up the whole mould. Extra or excess mixture will be squeezed out of the mould.
  • the mould will be opened in process step (d) when the temperature reaches between 100 and 200 °C and preferably at about 110°C.
  • the valves shorten the time for the product to be dried and thus shorten the processing time. Further without using this valve, the steam will take longer to escape through the side and out through the gap between the top and bottom parts of the mould, and if the steam takes too long to remove, the heat would cook or burn the center portion of the product while the sides are only just dry.
  • valves there is one valve every 4 square inches.
  • the valves cannot be placed in the sides of the mould as this would impede the proper spreading of the mixture to be moulded. If the valve was fixed to the side of the mould, steam would escape through it, thus reducing the pressure inside. This reduced steam pressure may cause the mixture not to flow to the space above the valve and create an incomplete product.
  • This invention enables the processing of a certain prescribed mixture to form products of various shapes and sizes suitable for protective packaging such as boxes and receptacles and coverings for electronic goods, cushioning packaging for delicate and fragile electronic and computer systems and components, food and beverage containers such as cups, plates, lunchboxes etc, building material and prefabricated boards such as partitions, ceiling boards and other shaped products eg garment hangers, horticultural and agricultural planters and pots, and disposable golf tees.
  • protective packaging such as boxes and receptacles and coverings for electronic goods, cushioning packaging for delicate and fragile electronic and computer systems and components
  • food and beverage containers such as cups, plates, lunchboxes etc
  • building material and prefabricated boards such as partitions, ceiling boards and other shaped products eg garment hangers, horticultural and agricultural planters and pots, and disposable golf tees.
  • FIG. 1 is a flow diagram of the process according to the invention.
  • Figure 2 is a schematic of an overview of the process.
  • Figure 3 is a perspective view of one embodiment of the mould of the present invention in the open position
  • Figure 4 is a perspective view of the mould in Figure 3 filled with the mixture
  • Figure 5 is a perspective view of the mould in Figure 4 closed and under pressure with the valve closed;
  • Figure 6 is a perspective view of the mould in Figure 5 with the valve now open
  • Figure 7 is a perspective view of the mould in Figure 6 opened with the product removed
  • Figure 8 is a cross-sectional view of a mould according to another embodiment of the invention.
  • Moulding mixtures having compositions according to the present invention were prepared.
  • the proportions of components present in the mixture are set out as examples 1 to 40 in the following table:
  • the moulding mixtures of examples 1 to 40 were used to make golf tees according to the moulding process of the present invention.
  • the golf tees were of good quality and suitable for their intended use.
  • Further moulding mixtures were prepared, analogous with the compositions of examples 1 to 40, except that the sugar cane pulp added as a source of fibre was replaced with fibre chosen from the group comprising wheat stalks, tea leaves, rice stalks, rice husks mixed with rice stalks, corn cobs including the leaves and the carbonaceous residue of burnt coconut shells.
  • the molding mixtures comprising each of the listed sources of fibre were used to make golf tees according to the moulding process of the present invention.
  • the golf tees comprising each different type of fibre were compared with the aforementioned golf tees comprising sugar cane pulp. While there were differences in quality of the golf tees depending on the type of fibre used, these differences did not have any significant effect on the performance of the golf tees.
  • the mould 20 shown in the drawings has a top mould part 21 and a bottom mould part 22.
  • the top mould part 21 has a valve 23 located in its upper surface 24.
  • the bottom mould part has a cavity 25 to receive mixture 26.
  • When mould 20 is closed there is a gap 27 of about 1 mm between the top mould part 21 and the bottom mould part 22. Once closed, pressure is applied to upper surface 24.
  • the valve 23 is operated either manually or automatically via a controller (not shown). Typically, the valve 23 is opened (see Figure 6) when the temperature of the mould 20 is at about 110°C. Once the article 28 has dried, the mould 20 is opened and the article 28 removed.
  • the process commences at A with pre-heating the mould 20 to 70°C. This heating is only required the first time that the mould 20 is used because in a continuous process the mould 20 would be at about 140°C from forming the last article 28 and is actually cooled to 70°C at B. Once formed the article 28 is removed from the mould 20 at C to be trimmed, sealed and further treated as desired.
  • the mould 20 is opened (see D of Figure 2) and overfilled with mixture 26 (see E).
  • the mixture is kept at ambient temperature (about 25 °C) or at least within the range of 15 to 40 °C.
  • the mould 20 is intentionally overfilled to ensure that there is sufficient mixture to evenly and completely fill the mould 20.
  • the mould 20 is not left cold because when the mixture 26 is compressed under pressure, the solids in the mixture would be forced and compressed to the bottom of the mould and water would separate from the mixture and be squeezed out through the gap or air vent. If the temperature goes above 100°C, the moisture will turn into steam too quickly and can cause an explosion.
  • the mould 20 is then closed (see F of Figure 2).
  • F of Figure 2 When closed, there is typically a gap 27 of about 1 mm between the top 21 and bottom 22 parts of the mould through which steam and excess mixture can escape.
  • a pressure of about 4000 PSI is applied to the top of the mould 20 (see G) for about 3 to 10 seconds until excess mixture starts coming out of the gap 27 between the mould parts 21 and 22.
  • the appearance of the excess material indicates that the mixture 26 has spread evenly throughout the mould 20 - this is especially important where the product is not flat and the mixture will need to move up the sides of the mould 20.
  • the pressure also ensures that the shape of the product is maintained (that is, there is no foaming), and controls the desired density/porosity of the product.
  • the pressure is reduced to atmospheric and then increased back to a pressure in the range of from 500 to 1500 PSI. In the examples we used a pressure of about 1000 PSI. Then the temperature was increased to about 140°C. The pressure is reduced to prevent an explosion due to the water turning into steam too quickly.
  • the mould 20 is opened and the substantially dried article 28 removed (see I). As there is overflow, the edge of the article has to be trimmed using a die cutting machine or manually (see J).
  • the article is then optionally coated with further adhesive by spraying or dipping (see K) and heated at 100°C to 140°C for about 10 seconds to 10 minutes to cure the adhesive. In the example we used temperature of about 130°C for about 8 minutes.
  • the article may be further coated with Neoprene to further enhance its water resistance (see L).
  • Neoprene typically about 3 grams of Neoprene is used per square foot of the product.
  • the coating is applied by spraying or dipping..
  • a decorative painting or print can be added to the surface of the product.
  • Mixture B provided a workable product.
  • Mixture C is useful for packaging for heavy products such as televisions or table tops or as a special cushioning with greater porosity.
  • Mixture A is economical and good for products which do not need a high density such as cups, bowls, industrial packaging for appliances.
  • Figure 8 shows a top part of a mould (100) comprising mould part (101) and valve (102).
  • Valve (102) sits in a complementarily shaped cavity (103) in mould part (101) and is free to move relative to mould part (101). Cavity (103) end in release hole (104) and valve end (105) is adapted to seal release hole (104) when the valve (102) in its closed position (not shown).
  • Valve (102) is closed by pressure being applied to top end (106).
  • steam can escape from the mould (100).

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Biological Depolymerization Polymers (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Lubricants (AREA)

Abstract

L'invention concerne un mélange à mouler, un procédé de moulage et un moule pour la fabrication de produits moulés. Le procédé consiste: (a) à préparer un mélange à mouler: (i) en prélevant 40 à 60 % en poids de pièces à base de fibres végétales et éventuellement en combinant de l'amidon ajouté à ces pièces; et (ii) en y ajoutant 10 à 55 % en poids d'eau et 3 à 10 % en poids d'au moins un agent ou adhésif soluble dans l'eau; (b) à verser le mélange dans un moule, qui est à une température d'au moins 60 °C; (c) à soumettre le mélange dans le moule à une température allant de 15 à 60 °C et à une pression allant de 1000 à 7000 PSI pendant un certain temps jusqu'à ce qu'une partie de l'eau dans le mélange soit transformée en vapeur qui amène le mélange à remplir le moule tout en restant à l'état moulable; (d) à réduire la pression de façon que la vapeur continue de se former à l'intérieur du moule sans provoquer d'explosion et tout en maintenant le mélange dans un état moulable; (e) à augmenter la température et la pression à une température allant de 100 à 200 °C et à une pression de 500 à 1500 PSI; (f) à évacuer la vapeur ou à la laisser s'échapper jusqu'à ce que le produit moulé soit sensiblement sec; (g) à enlever du moule le produit sensiblement sec et moulé. La quantité d'amidon ajouté se situe entre 0 et 10 % en poids, allant, de préférence, de 0 à 2 % en poids ou de 2 à 10 % en poids.
PCT/SG2001/000179 2000-09-09 2001-09-07 Procede de fabrication de produits moulables et moule conçu pour ce procede Ceased WO2002020666A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA002427530A CA2427530A1 (fr) 2000-09-09 2001-09-07 Procede de fabrication de produits moulables et moule concu pour ce procede
AU2001290490A AU2001290490A1 (en) 2000-09-09 2001-09-07 Process for manufacture of mouldable product and mould for use with this process
EP01970490A EP1332180A2 (fr) 2000-09-09 2001-09-07 Procede de fabrication de produits moulables et moule con u pour ce procede
JP2002525677A JP2004508229A (ja) 2000-09-09 2001-09-07 成形品を製造するためのプロセスおよびそのプロセスに使用するための型

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SG200005117-7 2000-09-09
SG200005117 2000-09-09
SG200104759-6 2001-08-08
SG200104759 2001-08-08

Publications (2)

Publication Number Publication Date
WO2002020666A2 true WO2002020666A2 (fr) 2002-03-14
WO2002020666A3 WO2002020666A3 (fr) 2002-08-08

Family

ID=26665218

Family Applications (3)

Application Number Title Priority Date Filing Date
PCT/SG2001/000178 Ceased WO2002020665A2 (fr) 2000-09-09 2001-09-07 Melange de moulage conçu pour la fabrication de produits moulables
PCT/SG2001/000179 Ceased WO2002020666A2 (fr) 2000-09-09 2001-09-07 Procede de fabrication de produits moulables et moule conçu pour ce procede
PCT/SG2001/000180 Ceased WO2002020667A2 (fr) 2000-09-09 2001-09-07 Produit moule

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/SG2001/000178 Ceased WO2002020665A2 (fr) 2000-09-09 2001-09-07 Melange de moulage conçu pour la fabrication de produits moulables

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/SG2001/000180 Ceased WO2002020667A2 (fr) 2000-09-09 2001-09-07 Produit moule

Country Status (6)

Country Link
EP (2) EP1332180A2 (fr)
JP (2) JP2004508446A (fr)
CN (2) CN1469907A (fr)
AU (3) AU2001290491A1 (fr)
CA (2) CA2427527A1 (fr)
WO (3) WO2002020665A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111021152A (zh) * 2019-10-22 2020-04-17 河南晖睿智能科技有限公司 一种环保可降解的建筑材料制备方法

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CN1469907A (zh) 2004-01-21
AU2001290489A1 (en) 2002-03-22
JP2004508229A (ja) 2004-03-18
AU2001290490A1 (en) 2002-03-22
WO2002020667A3 (fr) 2002-08-08
CA2427530A1 (fr) 2002-03-14
WO2002020666A3 (fr) 2002-08-08
CA2427527A1 (fr) 2002-03-14
WO2002020667A8 (fr) 2002-05-10
WO2002020665A3 (fr) 2002-08-08
WO2002020667A2 (fr) 2002-03-14
CN1469908A (zh) 2004-01-21
AU2001290491A1 (en) 2002-03-22

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