EP4028596A1 - Matériau de coulage - Google Patents

Matériau de coulage

Info

Publication number
EP4028596A1
EP4028596A1 EP20764065.7A EP20764065A EP4028596A1 EP 4028596 A1 EP4028596 A1 EP 4028596A1 EP 20764065 A EP20764065 A EP 20764065A EP 4028596 A1 EP4028596 A1 EP 4028596A1
Authority
EP
European Patent Office
Prior art keywords
wax
casting material
fibers
material according
casting
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.)
Pending
Application number
EP20764065.7A
Other languages
German (de)
English (en)
Inventor
Claus Stefanski
Friedrich BREIDENBACH
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.)
Greiner Zeroplast GmbH
Original Assignee
Waxell GmbH
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 Waxell GmbH filed Critical Waxell GmbH
Publication of EP4028596A1 publication Critical patent/EP4028596A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
    • C08L91/06—Waxes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/241—Moulding wax
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/58—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres
    • 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
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
    • 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
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/60—Waxes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—Oxides, hydroxides or carbonates
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper
    • 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
    • B29K2091/00—Use of waxes as moulding material
    • 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
    • B29K2401/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as filler
    • 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
    • B29K2509/00—Use of inorganic materials not provided for in groups B29K2503/00 - B29K2507/00, as filler
    • B29K2509/02—Ceramics
    • 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
    • C08K2003/262—Alkali metal carbonates
    • 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
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/30—Applications used for thermoforming
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils

Definitions

  • the present invention relates to a casting material according to the preamble of the independent claim, a molded part produced from this casting material, a method for producing the molded part, and the use of the molded material for forming a molded part.
  • Packaging materials are used in many areas, for example in the food industry or in the cosmetics industry. Packaging materials, in particular containers, are often made of plastics, ceramic materials or glass.
  • plastic has the disadvantage that often no renewable raw materials are used in its manufacture, which means that products from the petroleum industry are used, which have a negative impact on the greenhouse gas balance.
  • plastics have the disadvantage that, due to their low density, they do not convey any valuable haptics to the consumer, which is problematic in particular in the case of packaging for luxury products, such as high-quality cosmetics or perfumes.
  • Bioplastics are used to avoid the disadvantages of plastics made with petroleum-based raw materials.
  • the Plastics Europe Market Research Group (PEMRG) estimates that bioplastics currently make up 6% of all plastic packaging.
  • European Bioplastics (EUBP) assumes that the global production of bioplastics will increase by 18.8 percent from 2017 to 2022.
  • plastics of all kinds A particular problem with the use of plastics of all kinds is their disposal. Most types of plastic are extremely durable and using them for short-lived packaging is problematic, especially if the plastic materials end up in the environment. Over the years, the plastics break down into smaller and smaller parts - first into micro- and finally into nanoplastics. It is currently assumed that even microorganisms are not able to completely decompose plastics. In addition, pollutants can be released from the material.
  • the wall thicknesses of cream jars are made particularly thick, also in the bottom area, which is often doubled. It is also common to incorporate metal powder into plastics in order to achieve even more weight. Since cream jars are usually composed of several components made of different plastics, recycling is currently only possible with great effort or not at all.
  • the casting material should be processable and recyclable with little energy consumption.
  • the invention relates to a casting material consisting of or comprising:
  • organic binder wherein the organic binder is or comprises a wax, as well as
  • the filler mixture comprising or consisting of a mineral filler and a fibrous material.
  • the wax is contained in the casting material in a content between 3% by weight and 23% by weight
  • the mineral filler is contained in the casting material in a content between 75% by weight and 95% by weight is.
  • casting materials with particularly high levels of mineral fillers can be processed by using wax as a binder. Due to the high content of mineral fillers, the casting material has a particularly high density, in particular more than 1.5 g / cm 3 , particularly preferably more than 2.0 g / cm 3 . As a result, containers made from such a cast material have a particularly valuable feel and are therefore also suitable for use for packaging luxury products. The fland feel of a molded body made from such a cast material also meets the current high requirements.
  • the fibrous material increases the breaking strength of the molded part made from the casting compound.
  • the casting compound according to the invention offers several advantages over the materials known from the prior art, in particular over plastic or glass.
  • the components of the casting compound can preferably be selected so that their extraction does not compete with food and animal feed production. If necessary, substances that occur as by-products in food production can also be used. An example of this is rice wax.
  • the casting compound according to the invention is preferably free from plasticizers and other potentially harmful substances.
  • the casting compound according to the invention and molded bodies produced therefrom are naturally degradable or decomposable. Even if it is released into the environment, it can be returned to natural cycles.
  • Moldings that are produced from a casting compound according to the invention may have a significantly better ecological balance compared to plastics.
  • wax denotes a mixture of organic compounds or a single organic compound which is solid or kneadable at room temperature and melts at an elevated temperature, in particular above 40.degree. Melted waxes form liquids with low viscosity. It is believed that the low viscosity of the molten waxes facilitates the miscibility of the filler mixture with the binder.
  • Waxes can be, for example, aliphatic alcohols (more than 6 carbon atoms, in particular more than 10 carbon atoms), aliphatic carboxylic acids, ketones and long-chain hydrocarbons or a mixture of several of these substances.
  • the organic binder of the invention is optionally at a temperature between 50 ° C and 150 °, preferably between 70 ° C and 120 ° C, a liquid with no solids suspended therein.
  • the organic binder is preferably free from polymers.
  • the wax can be one or more of the following group: vegetable wax, animal wax, mineral wax, synthetic wax.
  • vegetable waxes are rice wax, castor wax / castor wax, sunflower wax, sugar cane wax, carnauba wax and candelilla wax.
  • animal waxes are wool wax and beeswax.
  • mineral waxes are paraffin wax and montan wax.
  • An example of a synthetic wax is stearin. Synthetic waxes can also include semi-synthetic waxes which are produced from natural substances by a chemical conversion step. For example, stearin can be obtained by saponifying vegetable oils.
  • Preferred waxes are vegetable waxes.
  • the mineral filler is preferably insoluble in water and / or not soluble in the binder. “Insoluble” or “insoluble” can mean that a substance dissolves in a concentration of at most 0.1% by weight in a liquid, preferably at a temperature of around 20 ° C.
  • the mineral filler is optionally selected from one or more water-insoluble alkali and / or alkaline earth metal compounds.
  • the mineral filler can be produced synthetically or obtained from a natural raw material, for example from a rock.
  • a preferred mineral filler is a magnesium or calcium compound, particularly preferably calcium carbonate.
  • mineral fillers that can be used are annaline, basalt, pumice, dolomite, glass, garnet, granite, flax ash, kaolin powder, bone ash, marble, meerschaum, quartz, chamotte, whiting chalk, silicon oxide, talc, volcanic ash, wollastonite, barium sulfate, bentonite, mica, montmorillonite , Barite.
  • the fiber material is preferably insoluble in water and / or not soluble in the binder.
  • the fiber material can be contained in the cast material in a content between 1% by weight and 15% by weight.
  • a preferred content of the fibrous material is between 1% by weight and 7% by weight.
  • a fibrous material according to the present invention can be a material which has a greater extent in one spatial direction than in the other two spatial directions.
  • a fiber material can therefore in particular have elongated aggregates with anisotropy in one spatial direction.
  • the fiber material can be one or more of the following group: natural fibers, in particular cellulose fibers, synthetic fibers, textile fibers, paper fibers, recycled fibers.
  • Preferred fibers are natural fibers, for example bagasse,
  • the fibrous material can optionally comprise waste materials, for example pre-consumer waste such as lyocell or modal fibers.
  • the fibrous material can also comprise or consist of fibrillated fibers.
  • the length of the fibers is optionally less than 10 mm, preferably less than 2 mm. This is particularly preferably between 100 gm and 1000 gm.
  • the filler mixture may have a melting point of over 150.degree. C., preferably of over 200.degree. As a result, the filler mixture does not melt at the usual processing temperatures for the casting compound.
  • the casting material comprises:
  • At least 95% by weight, preferably completely, of the casting compound is made from natural and / or renewable raw materials.
  • the casting compound according to the invention is non-toxic in production and use, non-phytotoxic, and free from harmful substances.
  • the casting compound according to the invention is essentially completely recyclable.
  • a molding can be melted in a recycling process.
  • the individual components can then be separated, for example by sieving, filtering, density separation, and the like.
  • the individual components can be returned to the manufacturing process after appropriate purification steps.
  • the invention also relates to a molded part which comprises or consists of a casting material according to the invention.
  • the molded part is optionally a container.
  • the invention also relates to a method for producing a molded part from a casting material according to the invention, the method comprising the following steps:
  • the molding of the mass can be done in particular by drop molding, injection molding, transfer molding, extrusion molding, deep drawing, calendering, rotational molding, pressure bag molding, compression molding.
  • Injection molding is a preferred molding process.
  • the invention also relates to the use of a casting material according to the invention for forming a molded part.
  • the casting material has the following composition: 80% by weight calcium carbonate as a mineral filler, 17% by weight rice wax as an organic binder and 3% by weight cellulose fibers.
  • Calcium carbonate (food grade,> 99%) is a powder with an average particle diameter of around 90 ⁇ m.
  • the cellulose fibers are wood fibers with an average length of about 200 ⁇ m.
  • the casting material is mixed in a mixing device until it is homogeneous and then introduced into an injection mold.
  • the mixing device is a compounding device commonly used in the plastics industry.
  • the injection mold comprises the mold for a container and the mold for a corresponding lid with a screw cap.
  • the molded products can be removed from the casting mold.
  • the wax content in the casting compound ensures easy removal from the mold even without the use of a release agent.
  • the material of the container obtained has a density of about 2.3 g / cm 3 . This gives it a valuable hand feeling and can be used for packaging high-quality cosmetic products.
  • the material of the container is completely recyclable. Since essentially no chemical crosslinking reactions take place when the casting compound is processed, the material can be melted again. Due to the low melting temperature of the wax, the energy consumption is low, but safe usability is guaranteed at normal use temperatures.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Inorganic Chemistry (AREA)
  • Composite Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne un matériau de coulage constitué d'un liant organique ou comprenant un liant organique, le liant organique étant ou comprenant une cire, et un mélange de charge, le mélange de charge comprenant ou consistant en une charge minérale et un matériau fibreux, la cire étant présente dans le matériau de coulage en une quantité comprise entre 3 % en poids et 23 % en poids, et la charge minérale étant présente dans le matériau de coulage en une quantité comprise entre 75 % en poids et 95 % en poids. L'invention concerne également un article moulé fabriqué à partir d'un tel matériau de coulage, un procédé de production d'un article moulé et l'utilisation d'un matériau de coulage pour former un article moulé.
EP20764065.7A 2019-09-12 2020-08-26 Matériau de coulage Pending EP4028596A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50794/2019A AT522905B1 (de) 2019-09-12 2019-09-12 Gussmaterial
PCT/EP2020/073807 WO2021047908A1 (fr) 2019-09-12 2020-08-26 Matériau de coulage

Publications (1)

Publication Number Publication Date
EP4028596A1 true EP4028596A1 (fr) 2022-07-20

Family

ID=72266293

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20764065.7A Pending EP4028596A1 (fr) 2019-09-12 2020-08-26 Matériau de coulage

Country Status (5)

Country Link
US (1) US20220298353A1 (fr)
EP (1) EP4028596A1 (fr)
CN (1) CN114502663A (fr)
AT (1) AT522905B1 (fr)
WO (1) WO2021047908A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3800031B1 (fr) * 2019-10-02 2022-06-29 Wittmann Battenfeld GmbH Procédé de moulage par injection d'une matière thermoplastique pouvant être moulée par injection

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399883B (de) * 1993-07-29 1995-08-25 Markus Dipl Ing Rettenbacher Formkörper aus bzw. mit einem umweltverträglichen werkstoff, verfahren zu dessen herstellung sowie dessen verwendung
DE4336749A1 (de) * 1993-10-28 1995-05-04 Draegerwerk Ag Vergußmasse für eine elektrische Baugruppe
EP1338405B1 (fr) * 2001-12-17 2006-07-26 HB-Feinmechanik GmbH & Co.KG Procédé de fabrication de pièces à base de polymères naturels
DE10302688A1 (de) * 2003-01-24 2004-08-05 Riemser Arzneimittel Ag Kreide-Paraffin-Packungen
US20060009556A1 (en) * 2004-07-08 2006-01-12 Mengshi Lu High gloss PET molding composition and articles made therefrom
DE202007017569U1 (de) * 2006-10-31 2008-04-03 Faber-Castell Ag Thermoplastische Formmasse und daraus hergestellter Formkörper
FR2964662B1 (fr) * 2010-09-15 2014-01-10 Didier Catellin Composition de moulage
CH706380A1 (de) * 2012-04-13 2013-10-15 Fluid Solids Ag C O Studio Beat Karrer Abbaubares Material aus biologischen Komponenten.
EP2930212B1 (fr) * 2014-04-08 2019-04-10 Ems-Patent Ag Masse de formage en polyamide électro-conductrice
AT516548B1 (de) * 2014-12-04 2017-08-15 Stefanski Claus Thermoplastisches Gussmaterial
CN106751436B (zh) * 2016-11-09 2019-06-18 上海欧亚合成材料有限公司 用于薄壁结构的酚醛模塑料
NL2021326B1 (en) * 2018-03-29 2019-10-07 Huhtamaki Molded Fiber Tech Bv Biodegradable and compostable food packaging unit from a moulded pulp material with a cellulose-base laminate layer, and method for manufacturing such food packaging unit

Also Published As

Publication number Publication date
WO2021047908A1 (fr) 2021-03-18
AT522905A1 (de) 2021-03-15
AT522905B1 (de) 2022-11-15
US20220298353A1 (en) 2022-09-22
CN114502663A (zh) 2022-05-13

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