WO2012038913A1 - Procédé pour traiter une poudre - Google Patents

Procédé pour traiter une poudre Download PDF

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Publication number
WO2012038913A1
WO2012038913A1 PCT/IB2011/054155 IB2011054155W WO2012038913A1 WO 2012038913 A1 WO2012038913 A1 WO 2012038913A1 IB 2011054155 W IB2011054155 W IB 2011054155W WO 2012038913 A1 WO2012038913 A1 WO 2012038913A1
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WO
WIPO (PCT)
Prior art keywords
powder
micrometers
surfactants
powders
compressed
Prior art date
Application number
PCT/IB2011/054155
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English (en)
Inventor
Paul Desmond Signal
Geoffrey Shaun Stevens
Original Assignee
Fonterra Co-Operative Group Limited
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Filing date
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Application filed by Fonterra Co-Operative Group Limited filed Critical Fonterra Co-Operative Group Limited
Publication of WO2012038913A1 publication Critical patent/WO2012038913A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C21/00—Whey; Whey preparations
    • A23C21/08—Whey; Whey preparations containing other organic additives, e.g. vegetable or animal products
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C17/00—Buttermilk; Buttermilk preparations
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C9/00—Milk preparations; Milk powder or milk powder preparations
    • A23C9/16—Agglomerating or granulating milk powder; Making instant milk powder; Products obtained thereby
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/40—Complete food formulations for specific consumer groups or specific purposes, e.g. infant formula
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23P—SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY A SINGLE OTHER SUBCLASS
    • A23P10/00—Shaping or working of foodstuffs characterised by the products
    • A23P10/20—Agglomerating; Granulating; Tabletting
    • A23P10/28—Tabletting; Making food bars by compression of a dry powdered mixture
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23P—SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY A SINGLE OTHER SUBCLASS
    • A23P10/00—Shaping or working of foodstuffs characterised by the products
    • A23P10/40—Shaping or working of foodstuffs characterised by the products free-flowing powder or instant powder, i.e. powder which is reconstituted rapidly when liquid is added
    • A23P10/47—Shaping or working of foodstuffs characterised by the products free-flowing powder or instant powder, i.e. powder which is reconstituted rapidly when liquid is added using additives, e.g. emulsifiers, wetting agents or dust-binding agents
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs

Definitions

  • the present invention relates to a method for processing powders, particularly to a method for altering one or more characteristics of a powder selected from bulk density, flowability, dustiness, dispersibility, wettability, hydration viscosity, rate of hydration, rate of dissolution, solubility, sedimentation, suspension stability, blendability and caking, such as a method of increasing one or more of the flowability, wettability or dispersibility of a powder, such as a food powder, dairy powder or infant formula.
  • Spray-drying is a common form of producing powders. Food, protein and dairy powders for example are typically spray-dried. Spray-drying gives rise to powders that may not be adequately flowable or readily wettable or dispersible in aqueous solutions.
  • a first aspect of the present invention relates to a method of processing a powder, the method comprising, consisting essentially of or consisting of
  • a second aspect of the present invention relates to a method of altering at least one characteristic of a powder, the method comprising, consisting essentially of or consisting of
  • surfactants to produce a powder having at least one altered characteristic selected from bulk density, flowability, dustiness, dispersibility, wettability, hydration viscosity, rate of hydration, rate of dissolution, solubility, sedimentation, suspension stability, blendability and caking, or any combination of any two or more thereof.
  • a third aspect of the present invention relates to a method of processing an infant formula, the method comprising, consisting essentially of or consisting of (1) subjecting an infant formula powder comprising one or more powders and one or more surfactants to a compression step at a treatment pressure to produce a compressed infant formula powder, and
  • a fourth aspect of the present invention relates to a method of altering at least one characteristic of an infant formula powder, the method comprising, consisting essentially of or consisting of
  • an infant formula powder comprising one or more powders and one or more surfactants to a compression step at a treatment pressure to produce a compressed infant formula powder
  • a milling step to produce an infant formula powder having at least one altered characteristic selected from bulk density, flowability, dustiness, dispersibility, wettability, hydration viscosity, rate of hydration, rate of dissolution, solubility, sedimentation, suspension stability, blendability and caking, or any combination of any two or more thereof.
  • a fifth aspect of the present invention relates to a powder comprising less than about 1% by weight of one or more surfactants, the powder having a bulk density of at least about 0.55 g/ml, a flowability of less than about 100 seconds and one or both of a wettability at 25°C of less than about 200 seconds and a dispersibility at 25°C of less than about 7.
  • the powder is an infant formula.
  • the infant formula comprises at least one source of protein, at least one source of lipid and at least one source of carbohydrate, preferably according to art standard ranges including about 10 to about 40% by weight of at least one source of protein, about 10 to about 40% by weight of at least one source of lipid and about 30 to about 60% by weight of at least one source of carbohydrate.
  • Another aspect of the invention relates to a powder produced by a method of the invention.
  • the powder comprises at least one food powder, such as one or more protein powders, one or more lipid powders, one or more carbohydrate powders, one or more mineral powders, or any combination of any two or more thereof.
  • the powder is agglomerated or non-agglomerated.
  • the protein, lipid or carbohydrate powder is a plant protein, lipid or carbohydrate powder, an animal protein, lipid or carbohydrate powder, or any combination of any two or more thereof.
  • the dairy powder is at least one dairy powder or a mixture of dairy powders.
  • the mixture may be of dairy powders of the same type (e.g. whole milk powders) or powders of different types (e.g. one or more whole milk powders and one or more skim milk powders).
  • the dairy powder may also be a mixture of one or more dairy powders and one or more non-dairy powders for example.
  • the dairy powder is from a cow, sheep, goat, pig, buffalo, camel, yak, horse, donkey, llama or human source or any mixture of any two or more thereof.
  • a suitable dairy powder may include infant formula (including follow-on formulas and growing up formulas), cheese powder, cream powder, milk powder, colostrum powder, a powder of a fraction of milk, a powder of a fraction of colostrum or any combination of any two or more thereof, for example.
  • the dairy powder may be selected from whole milk powder, skim milk powder, low fat milk powder, whole milk retentate powder, skim milk retentate powder, low fat milk retentate powder, buttermilk powder, ultrafiltered milk retentate powder, milk protein concentrate (MPC), milk protein isolate (MPI), calcium depleted milk protein concentrate (MPC), low fat milk protein concentrate (MPC), colostrum powder, a powder of a colostrum fraction, colostrum protein concentrate (CPC), colostrum whey powder, a powder of an immunoglobulin fraction from colostrum, whey powder, whey protein isolate (WPI), whey protein concentrate (WPC), sweet whey powder, lactic acid whey powder, mineral acid whey powder, a powder of a composition derived from any milk or colostrum processing stream, a powder of a composition derived from the retentate or permeate obtained by ultrafiltration or microfiltration of any milk or colostrum processing stream, or
  • the dairy powder is milk protein concentrate, skim milk powder, whole milk powder or any combination of any two or more thereof. In a particularly preferred embodiment the dairy powder is whole milk powder.
  • the compression step may be achieved by any suitable method, such as compaction or tableting for example.
  • the compression step is roll compaction.
  • the treatment pressure is a compression force or a surface roll force of at least about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 or 30 kN/ cm, and useful ranges may be selected between any of these values (for example, about 1 to about 2, about 1 to about 3, about 1 to about 4, about 1 to about 5, about 1 to about 6, about 1 to about 7, about 1 to about 8, about 1 to about 9, about 1 to about 10, about 1 to about 15, about 1 to about 20, about 1 to about 25, about 1 to about 30, about 2 to about 10, about 3 to about 10, about 4 to about 10, about 5 to about 10, about 6 to about 10, about 7 to about 10, about 8 to about 10, about 9 to about 10, about 2 to about 9, about 3 to about 8, about 4 to about 7 and about 5 to about 6 kN/ cm).
  • the treatment pressure is about 2 to about 9, about 3 to about 8, about 4 to about 7 or about 5 to about 6 kN/ cm.
  • the milling step produces a powder having particle sizes within one or more specified ranges.
  • the milled powder is subjected to a screening step.
  • the screening step may produce a powder having particle sizes within one or more specified ranges.
  • the screening step may comprise sieving, cyclone screening, or classifier milling, for example. Any other suitable screening method known in the art may be used.
  • At least about 50, 55, 60, 65, 70, 75, 80, 85, more preferably at least about 90%, more preferably at least about 95%, most preferably at least about 99% of the particles of the powder have sizes within the specified range(s).
  • At least one specified range is about 0.1 micrometers to about 5 millimetres, about 10 micrometers to about 1 millimetre, about 100 micrometers to about 900 micrometers, about 200 micrometers to about 800 micrometers, about 200 micrometers to about 700 micrometers, about 300 micrometers to about 600 micrometers, or about 350 micrometers to about 500 micrometers.
  • the method may produce a powder having particle sizes within one specified range.
  • the method may produce a powder having particle sizes within two or more specified ranges. That is, some of the particles of the powder will have a size within a first specified range, and other particles of the powder will have a size within a second specified range, and so on.
  • the method comprises screening the milled powder to produce a first powder having particle sizes within a first specified range, a second powder within a second specified range, and optionally a third powder within a third specified range.
  • the second powder has particle sizes larger than the first specified range or smaller than the first specified range.
  • the third powder has particles larger than the first specified range or smaller than the first specified range.
  • the second powder has particle sizes larger than the first specified range and the third powder has particles smaller than the first specified range.
  • the first specified range may be selected from about 0.1 micrometers to about 5 millimetres, about 10 micrometers to about 1 millimetre, about 100 micrometers to about 900 micrometers, about 200 micrometers to about 800 micrometers, about 200 micrometers to about 700 micrometers, about 300 micrometers to about 600 micrometers, and about 350 micrometers to about 500 micrometers.
  • the milling is preferably achieved by a rotating mill. Any other suitable milling method known in the art may be used.
  • the powder is contacted with one or more surfactants.
  • the compressed powder is contacted with one or more surfactants.
  • the milled powder is contacted with one or more surfactants.
  • the step of contacting the powder, compressed powder or milled powder with one or more surfactants comprises contacting the powder and one or more surfactants batch-wise or continuously. In one preferred embodiment this step comprises fluidising the powder in a fluid bed and contacting the fluidised powder with one or more surfactants. Any other suitable method known in the art may be used.
  • the one or more surfactants are selected from one or more natural surfactants or one or more synthetic surfactants or a combination thereof.
  • Natural surfactants include but are not limited to egg-yolk lecithin, soy lecithin, dairy lecithin, polar lipids.
  • Synthetic surfactants include but are not limited to sorbitan esters and their ethoxylates and sucrose esters. In some embodiments the one or more surfactants are selected from one or more natural surfactants or one or more synthetic surfactants or a combination thereof.
  • Natural surfactants include but are not limited to egg-yolk lecithin, soy lecithin, dairy lecithin, polar lipids.
  • Synthetic surfactants include but are not limited to sorbitan esters and their ethoxylates and sucrose esters.
  • the one or more surfactants are selected from
  • the surfactant is a food grade surfactant.
  • the one or more surfactants are selected from lecithin, plant lecithin, soy lecithin, dairy lecithin, dairy phospholipids and any other surfactant known in the art, particularly food grade surfactants.
  • the step of contacting the powder, compressed powder or milled powder with one or more surfactants comprises adding at least about 0.05, 0.075,
  • 0.1,0.125, 0.15, 0.175, 0.2, 0.225, 0.25, 0.275, 0.3, 0.325, 0.35, 0.375, 0.4, 0.425, 0.45, 0.475, or 0.5 % surfactant by weight and useful ranges may be selected between any of these values (for example, about 0.1 to about 0.4, or about 0.1 to about 0.5 % by weight). In one preferred embodiment, about 0.1% to about 0.35% by weight surfactant, preferably lecithin, is added.
  • At least one characteristic selected from bulk density, flowability, dustiness, dispersibility, wettability, hydration viscosity, rate of hydration, rate of dissolution, solubility, sedimentation, suspension stability, blendability and caking, or any combination of any two or more thereof is maintained or is increased by about at least 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 50, 90, 95, 99, 100, 150, 200, 250, 300, 350, 400, 450, 490, 495, 499, or 500% compared to a powder that has not been subjected to a method of the invention, and useful ranges may be selected between any of these values (for example, about 1 to about 5, about 1 to about 50, about 1 to about 100 or about 1 to about 500%).
  • the powder of the present invention comprises less than about 1, 0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1, or 0.05% by weight of one or more surfactants, and useful ranges may be selected between any of these values (for example, about 0.05 to about 0.5, about 0.05 to about 0.6, about 0.05 to about 0.7, about 0.05 to about 0.8, about 0.05 to about 0.9, or about 0.05 to about 1% by weight).
  • the powder of the present invention has a bulk density of at least about 0.55, 0.56, 0.57, 0.58, 0.59, 0.60, 0.61, 0.62, 0.63, 0.64, 0.65, 0.66, 0.67, 0.68, 0.69, 0.70, 0.71, 0.72, 0.73, 0.74, 0.75, 0.76, 0.77, 0.78, 0.79, 0.80, 0.85, 0.90, or 0.95 g/ml or more, and useful ranges may be selected between any of these values (for example, about 0.55 to about 0.80, about 0.60 to about 0.80 or about 0.65 to about 0.80 g/ml). Bulk density may be determined by GEA Niro Method No. A 2 a, 2006.
  • the powder of the present invention has a flowability of less than about 100, 95, 90, 85, 80, 75, 70, 65, 60, 55, 50, 45, 40, 35, or 30 seconds, and useful ranges may be selected between any of these values (for example, about 30 to about 100, about 40 to about 100 or about 50 to about 100 seconds). Flowability may be determined by GEA Niro Method No. A 23 a.
  • the powder of the present invention has a wettability at 25°C of less than about 200, 190, 180, 170, 160, 150, 140, 130, 120, 110, 100, 90, 80, 70, 60, 50, 40, 30, 20 or 10 seconds, and useful ranges may be selected between any of these values (for example, about 10 to about 200, about 20 to about 200, about 30 to about 200, about 40 to about 200, or about 50 to about 200 seconds). Wettability may be determined by GEA Niro Method No. A 5 b, 2006.
  • the powder of the present invention has a dispersibility at 25°C of about 7, 6, 5, 4, 3, 2 or 1 or less as determined by IDF 87:1979, and useful ranges may be selected between any of these values (for example, 1 to 7, 1 to 6, 1 to 5, 1 to 4, 2 to 7, 2 to 6, 2 to 5 or 2 to 4).
  • This invention may also be said broadly to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, and any or all combinations of any two or more said parts, elements or features. Where specific integers are mentioned herein which have known equivalents in the art to which this invention relates, such known equivalents are deemed to be incorporated herein as if individually set forth.
  • Figure 1 is a schematic diagram of the apparatus used in the method described in the Examples.
  • the inventors have determined that compressing powders and contacting compressed powders with lecithin can increase one or more of the flowability, wettability or dispersibility, amongst other properties of the powder.
  • the powder in the method of the present invention is preferably at least one food powder, such as one or more protein powders, one or more lipid powders, one or more carbohydrate powders, one or more mineral powders, or any combination of any two or more thereof.
  • the powder may comprise, for example, a protein powder or a mixture of protein powders or a mixture of one or more protein powders and one or more non-protein powders, a lipid powder or a mixture of lipid powders or a mixture of one or more lipid powders and one or more non- lipid powders, and so on.
  • the powder is agglomerated or non-agglomerated.
  • the protein, lipid or carbohydrate powder is a plant protein, lipid or carbohydrate powder such as a legume powder, starch powder, or soy powder; or an animal protein, lipid or carbohydrate powder such as a meat powder or dairy powder; or a consumer powder such as a drink powder or infant formula (including follow-on formulas and growing up formulas).
  • any such protein, lipid or carbohydrate powder may contain other components such as protein, lipid, carbohydrate and minor components such as vitamins and minerals, or any combination thereof.
  • Protein powders of any type may comprise protein concentrates, isolates or hydrolysates, or any combination thereof.
  • any such powders may comprise blends of powders, including blends comprising protein or non-protein powders such as lipid powders, carbohydrate powders, or powders comprising nutrients such as vitamins and minerals, or any combination thereof.
  • the powder is a dairy powder or a mixture of dairy powders including those described in the Dairy Processing Handbook (Tetra Pak Processing Systems, 2 nd Edition, Lund, Sweden, 2003).
  • the mixture may be of dairy powders of the same type (e.g. whole milk powders) or powders of different types (e.g. whole milk powders and skim milk powders).
  • the dairy powder may also be a mixture of one or more dairy powders and one or more non-dairy powders for example.
  • Non-dairy powders may include carbohydrate powders, protein powders, lipid powders or any combination of two or more thereof for example.
  • Non-dairy powders may be from animal, plant or micro-organisms sources including bacteria or yeast for example.
  • the dairy powder is from a cow, sheep, goat, pig, buffalo, camel, yak, horse, donkey, llama or human source or mixtures thereof.
  • Suitable dairy powders include infant formula (including follow-on formulas and growing up formulas), cheese powders, cream powders, milk powders, colostrum powders, powders of fractions of milk, or powders of fractions of colostrum, for example.
  • the dairy powder may be selected from whole milk powder, skim milk powder, low fat milk powder, whole milk retentate powder, skim milk retentate powder, low fat milk retentate powder, buttermilk powder, ultrafiltered milk retentate powder, milk protein concentrate (MPC), milk protein isolate (MPI), calcium depleted milk protein concentrate (MPC), low fat milk protein concentrate (MPC), colostrum powder, a powder of colostrum fraction, colostrum protein concentrate (CPC), colostrum whey powder, a powder of an immunoglobulin fraction from colostrum, whey powder, whey protein isolate (WPI), whey protein concentrate (WPC), sweet whey powder, lactic acid whey powder, mineral acid whey powder, a powder of a composition derived from any milk or colostrum processing stream, a powder of a composition derived from the retentate or permeate obtained by ultrafiltration or microfiltration of any milk or colostrum processing stream, or a powder
  • the dairy powder may be selected from calcium caseinate, milk protein concentrate, skim milk powder, or whole milk powder.
  • infant formulas include follow-on formulas and growing-up formulas.
  • Infant formulas generally comprise a source of protein, a source of lipid, a source of carbohydrate and optionally sources of vitamins, minerals, fibre and other nutrients.
  • Infant formulas are formulated according international and national food regulations and may be predominantly dairy or predominantly non-dairy depending on whether the lipid, protein and carbohydrate is from a plant source (such as soy) or dairy source.
  • the infant formula comprises one or more powders, including one or more dairy powders or one or more non-dairy powders or a combination thereof, and one or more surfactants, and the infant formula is formulated and then subjected to the compression and milling steps.
  • the powder may have been prepared using any suitable methods known in the art such as by spray-drying, roll-drying and freeze-drying a liquid. 2. Compressing, milling and screening
  • the compression step in the method of the present invention may be achieved by any suitable method, such as compaction or tableting for example.
  • Tableting of powdered milk is for example described in a Meiji patent WO 2006/004190, the contents of which are hereby incorporated in their entirety by reference.
  • Compaction has been used in other industries. For example, battery material is compacted to produce more dense material, so that the battery charge lasts longer than uncompressed material. In the pharmaceutical industry methods involving compaction then milling are used to ensure adequate dosage control in tablets and other medicines.
  • the compression step is achieved by roll compaction.
  • the processing conditions during roll compaction may be varied so as to affect the size range of particles in the powder, or the characteristics of the powder, or both. These conditions include:
  • Varying the speed of the rollers preferably anywhere from about 1 rpm to about 50rpm. ⁇ The choice and level of vacuum applied to any feed screws.
  • Varying the pressure of the rollers preferably from about 1 kN/ cm to about 50 kN/cm.
  • Suitable roll compaction apparatus are available from Fitzpatrick Company of Elmhurst, Illinois 60126, USA, particularly that supplied under the brand name Chilsonator®, and the Roller Compactors manufactured by Alexanderwerk AG of Remscheld, Germany.
  • the milling in the methods of the present invention is preferably achieved by a rotating mill. Any other suitable milling method known in the art may be used.
  • Milling generally results in a 'milled powder' that encompasses a desired particle size range.
  • Various known methods of milling can be conducted by an art skilled worker, including techniques such as crushing, comminution, grinding, pulverising and trituration for example.
  • Milling is usually followed by screening, also known as size fractionation. Screening is a method of separating particles according to size alone. In this process, the desired size range is selected from the 'milled powder'. Particles which are too large (Overs') and particles which are too small ('fines') are recycled back to either the rollers or the mill.
  • Screening is a method of separating particles according to size alone. In this process, the desired size range is selected from the 'milled powder'. Particles which are too large (Overs') and particles which are too small ('fines') are recycled back to either the rollers or the mill.
  • feed hopper (1) provides one or more powders to feed screw (2) that transports the one or more powders to vacuum transport hopper (3).
  • the one or more powders are fed from vacuum transport hopper (3) to top feed hopper (4).
  • Top feed hopper (4) provides the one or more powders to horizontal feed screw (5) that in turn feeds vertical feed screw (6).
  • the one or more powders drop from vertical feed screw (6) into the space between rotating compactor rolls (7).
  • Compactor rolls (7) are counter-rotating inwards. Compressed powder then falls into comminutor (8) and from there into separator (9).
  • Separator (9) is a vibro-energy separator that uses vibration and two or more screens to separate particles of compressed powder by size.
  • the method comprises screening the milled powder to produce a first powder having particle sizes within a first specified range, a second powder within a second specified range, and optionally a third powder within a third specified range.
  • the second powder has particle sizes larger than the first specified range or smaller than the first specified range.
  • the third powder has particles larger than the first specified range or smaller than the first specified range.
  • the second powder has particle sizes larger than the first specified range and the third powder has particles smaller than the first specified range.
  • the first specified range may be selected from about 0.1 micrometers to about 5 millimetres, about 10 micrometers to about 1 millimetre, about 100 micrometers to about 900 micrometers, about 200 micrometers to about 800 micrometers, about 200 micrometers to about 700 micrometers, about 300 micrometers to about 600 micrometers, and about 350 micrometers to about 500 micrometers.
  • the method may comprise screening the milled powder to produce a first powder having particle sizes within a first specified range, a second powder within a second specified range, and optionally a third powder within a third specified range by contacting the milled powder with a first sieve screen and optionally a second sieve screen.
  • the first sieve screen will have openings larger that the second sieve screen and will usually be positioned above the second sieve screen, although that is not essential.
  • the first sieve screen may have openings of at least about 450, 475, 500, 525, 550, 575, 600, 625, 650, 675,700, 725, 750, 775, 800, 825, 850, 875, 900, 925, 950, 975, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500 or 5000
  • micrometres and useful ranges may be selected between any of these values (for example, about 450 to about 700, about 450 to about 650 or about 475 to about 600 micrometres).
  • the second sieve screen may have openings of less than about 0.1, 0.5, 1, 5, 10, 50, 100, 150, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425 or 450 micrometres and useful ranges may be selected between any of these values (for example, about 200 to about 450, about 250 to about 400 or about 300 to about 375 micrometres).
  • step of contacting the powder, compressed powder or milled powder with one or more surfactants comprises contacting the powder and one or more surfactants batch-wise or continuously.
  • a batch-wise process can comprise distributing the powder in a rotating tumbler and contacting the distributed powder with the one or more surfactants applied using spray nozzles. Any other suitable batch method known in the art may be used.
  • a continuous process can comprise fluidising the powder in a fluid bed and contacting the fluidised powder the one or more surfactants applied using spray nozzles. Any other suitable continuous method known in the art may be used.
  • the one or more surfactants are selected from one or more natural surfactants or one or more synthetic surfactants or a combination thereof.
  • Natural surfactants include but are not limited to egg-yolk lecithin, soy lecithin, dairy lecithin, polar lipids.
  • Synthetic surfactants include but are not limited to sorbitan esters and their ethoxylates and sucrose esters. In some embodiments the one or more surfactants are selected from
  • the surfactant is a food grade surfactant.
  • the one or more surfactants are selected from lecithin, plant lecithin, soy lecithin, dairy lecithin, dairy phospholipids and any other surfactant known in the art, particularly food grade surfactants.
  • fluid bed dryer (13) receives product from product outlet (12). Air heater (14), surfactant pump (15) and surfactant vessel (16), air compressor (17), and fan (18) supply compressed air, warmed air and surfactant to the fluid bed dryer (13). The surfactant is sprayed into the dryer (13) through spray nozzles.
  • Figure 1 depicts a preferred embodiment of the invention, it should be understood that surfactant may be introduced at any suitable point in the process, such as at a point before the powder enters feed hopper (1), feed hopper (4), compactor rolls (7) or before the compressed powder contacts comminutor (8), for example.
  • Feed and recycle transfer path (21) and feed path (25) will typically be vacuum feeds.
  • Feed paths (22) and (23) and recycle path (24) will generally be gravity feeds. It should be understood that any suitable transfer method known in the art may be used, including feeds employing gravity, air flow, suction, or movement such as conveyors or bucket lift conveyors.
  • the methods of the present invention can be used to alter at least one characteristic of a powder selected from bulk density, flowability, dustiness, dispersibility, wettability, hydration viscosity, rate of hydration, rate of dissolution, solubility, sedimentation, suspension stability, blendability or caking properties.
  • the powder has increased flowability, wettability or dispersibility, or a combination thereof.
  • the powder also has an altered characteristic selected from free fat, poured bulk density or bulk density, or any combination of any two or more thereof.
  • the at least one characteristic is maintained or is increased by about at least 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 50, 90, 95, 99, 100, 150, 200, 250, 300, 350, 400, 450, 490, 495, 499, or 500% compared to a powder that has not been subjected to a method of the invention, and useful ranges may be selected between any of these values.
  • Altering characteristics such as flowability provide many benefits including cost and time and the ability to use different packaging formats. For example, increased flowability can mean reduced reconstitution time, less wasted powder during processing, less effort and less handling when using the powder in a downstream process.
  • Altering hydration characteristics such as dispersibility and wettability for example can also improve cost and time.
  • Altering the bulk density can be beneficial in a number of ways. Increased bulk density for example can mean less packaging and transport costs.
  • WMP Regular Whole Milk Powder
  • IR-520 ChilsonatorTM Regular Whole Milk Powder
  • the WMP was compressed by a vertical feed screw and compacted by the compactor rolls (bead-blasted, sine profiled rolls were installed).
  • the compacted WMP dropped from the compactor rolls to feed into a Fitzpatrick M5A Comminutor (a mill), with knife mill blades and a mesh mill screen with 0.036" (914 ⁇ ) openings installed, to mill the compacted WMP.
  • the interim product stream (the 355 ⁇ to 500 ⁇ particle diameter fraction) was collected for lecithination using a Glatt UniGlattTM fluid bed dryer with spray nozzle insert drying chamber.
  • the dryer was pre-heated while empty to about 70°C. Once the dryer was up to temperature the fan was shut off, the fluid bed chamber removed and a 1.25 kg batch of the interim product put into the dryer chamber. The chamber was replaced on the dryer, the fan turned on and the powder heated to about 70°C over 1 - 2 minutes. A fan speed setting of approximately 100 allowed a stable fluid bed to form.
  • the spray nozzle of the dryer was preheated by passing about 70°C sunflower oil through it. Once the nozzle had been preheated the sunflower oil was replaced with about 65°C lecithin (Bakels Edible Oils (N.Z.) Ltd, Yelkin Gold Instantising Blend).
  • the lecithin pump was set at about 2 mL/ minute lecithin flow rate with about 0.5 bar air pressure at the spray nozzle giving an acceptable lecithin spray pattern without completely atomizing the lecithin.
  • the lecithin pump was turned off (leaving the air supply to the nozzle on) and the spray nozzle quickly inserted into the nozzle insert on the dryer chamber wall. Once the spray nozzle was inserted the lecithin pump was turned back on and a timer started. The lecithin pump was left on for two minutes to obtain about 0.32% w/w lecithin on a 1.25 kg powder batch.
  • Free fat Free fat is ether extracted from the sample under standard conditions, the solvent evaporated and the residue weighed.
  • the free fat content of the sample is defined as that part of the fat which can be extracted with a specified organic solvent under standardised conditions. Petroleum ether (AR or redistilled, boiling range 40-60°C) is the solvent.
  • the fat is extracted at room temperature with thorough mixing. The sample may be warmed to 34-40 °C in a water bath and quickly returned to room temperature when uniform dispersal of the fat has been achieved. See, for example, GEA Niro Method No. A 10 a, revised September 2005.
  • poured bulk density The poured bulk density of the powder is determined by weighing out powder and determining the volume it occupies when poured into a measuring cylinder. See, for example, GEA Niro Method No. A 2 a, revised September 2006.
  • Wettability is the ability of 10.00 ⁇ 0.05 g of instantised milk powder to become wetted when placed on the surface of water, expressed as the time in seconds required for all the particles to sink below the surface or assume a "typical" wet appearance. See, for example, GEA Niro Method No. A 5 b, revised September 2006 or IDF 87:1979 - Instant dried milk - Determination of the dispersibility and wettability.
  • Dispersibility This test looked at the dispersibility rate of each sample when added to water at the stated temperature. The result is given as a relative grade of dispersability (1 - 7). See, for example, IDF 87:1979 or GEA Niro Method No. A 6 a, revised September 2005.
  • Coffee sediment powder The sample is added directly to hot coffee and the degree of sedimentation measured.
  • Sediment This test measures the volume of sediment in the reconstituted sample after centrifuging.
  • Sludge The sludge test is a measure of the residue of partially dissolved powder found in the vessel used for reconstitution.
  • IWMP instantised WMP
  • the powders produced by the method of the present invention may be used in any commercial application of powders including the dairy and food industries.

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Pediatric Medicine (AREA)
  • Mycology (AREA)
  • Nutrition Science (AREA)
  • Zoology (AREA)
  • Dairy Products (AREA)

Abstract

Procédé pour traiter des poudres, en particulier, procédé pour modifier une ou plusieurs caractéristiques d'une poudre, lesdites caractéristiques étant choisies parmi la densité apparente, la coulabilité, l'aptitude à former des poussières, la dispersibilité, la mouillabilité, la viscosité d'hydratation, la vitesse d'hydratation, la vitesse de dissolution, la solubilité, la sédimentation, la stabilité en suspension, l'aptitude à se mélanger et à former des grumeaux, tel qu'un procédé destiné à augmenter une ou plusieurs des caractéristiques parmi la coulabilité, la mouillabilité ou la dispersibilité d'une poudre du type aliment en poudre, produit laitier en poudre ou formule pour bébé.
PCT/IB2011/054155 2010-09-23 2011-09-22 Procédé pour traiter une poudre WO2012038913A1 (fr)

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WO2016014492A1 (fr) * 2014-07-21 2016-01-28 Abbott Laboratories Système de distribution de nutriments comprenant une poudre nutritionnelle comprenant des phospholipides pour améliorer la mouillabilité
WO2016014519A1 (fr) * 2014-07-21 2016-01-28 Abbott Laboratories Système de distribution de nutriments
WO2016014503A1 (fr) * 2014-07-21 2016-01-28 Abbott Laboratories Dosettes de poudre nutritionnelle et procédés associés
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EP3171716A1 (fr) * 2014-07-21 2017-05-31 Abbott Laboratories Capsule de poudre nutritionnelle contenant une poudre nutritionnelle extrudée
EP3171743A1 (fr) * 2014-07-21 2017-05-31 Abbott Laboratories Capsules de poudre nutritionnelle comprenant des hydrates de carbone mélangés à sec
WO2018158433A1 (fr) 2017-03-03 2018-09-07 Nestec S.A. Composition nutritionnelle sous forme de poudre fournie dans des capsules à usage unique
US20190104749A1 (en) * 2014-10-27 2019-04-11 Caloris Engineering, LLC System and method for production of low thermophile and low spore milk powder
WO2021043758A1 (fr) 2019-09-04 2021-03-11 Société des Produits Nestlé S.A. Poudre de fruit compacté et boissons en poudre
BE1028973B1 (fr) * 2020-12-30 2022-08-01 Belourthe Procédé de préparation et de conditionnement d’une pluralité de poudres de boisson instantanée

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Cited By (12)

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WO2016014492A1 (fr) * 2014-07-21 2016-01-28 Abbott Laboratories Système de distribution de nutriments comprenant une poudre nutritionnelle comprenant des phospholipides pour améliorer la mouillabilité
WO2016014519A1 (fr) * 2014-07-21 2016-01-28 Abbott Laboratories Système de distribution de nutriments
WO2016014503A1 (fr) * 2014-07-21 2016-01-28 Abbott Laboratories Dosettes de poudre nutritionnelle et procédés associés
WO2016014497A1 (fr) * 2014-07-21 2016-01-28 Abbott Laboratories Capsules de poudre nutritionnelle contenant des poudres nutritionnelles ayant des propriétés de fluidité volumique
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EP3171716A1 (fr) * 2014-07-21 2017-05-31 Abbott Laboratories Capsule de poudre nutritionnelle contenant une poudre nutritionnelle extrudée
EP3171743A1 (fr) * 2014-07-21 2017-05-31 Abbott Laboratories Capsules de poudre nutritionnelle comprenant des hydrates de carbone mélangés à sec
US20190104749A1 (en) * 2014-10-27 2019-04-11 Caloris Engineering, LLC System and method for production of low thermophile and low spore milk powder
US10687540B2 (en) * 2014-10-27 2020-06-23 Caloris Engineering, LLC System and method for production of low thermophile and low spore milk powder
WO2018158433A1 (fr) 2017-03-03 2018-09-07 Nestec S.A. Composition nutritionnelle sous forme de poudre fournie dans des capsules à usage unique
WO2021043758A1 (fr) 2019-09-04 2021-03-11 Société des Produits Nestlé S.A. Poudre de fruit compacté et boissons en poudre
BE1028973B1 (fr) * 2020-12-30 2022-08-01 Belourthe Procédé de préparation et de conditionnement d’une pluralité de poudres de boisson instantanée

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