CN102727393A - Ultra-fine microcrystalline cellulose talcum powder and preparation method of ultra-fine microcrystalline cellulose talcum powder - Google Patents
Ultra-fine microcrystalline cellulose talcum powder and preparation method of ultra-fine microcrystalline cellulose talcum powder Download PDFInfo
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Abstract
The invention discloses natural talcum powder and is characterized in that the natural talcum powder is prepared from ultra-fine microcrystalline cellulose particles by vacuum drying, ultraviolet sterilizing and sieving ultra-fine microcrystalline cellulose particles and packaging in a sterile operation chamber. The ultra-fine microcrystalline celluloses are ultra-fine natural particles refined from plant fibers through acid hydrolysis, and particle diameter is between 0.2mu m and 3.0mu m. The ultra-fine microcrystalline celluloses have large specific surface area and good hygroscopicity and have functions of softening and smoothening skin. The ultra-fine microcrystalline cellulose particles are dried, sterilized, sieved, and packaged in the sterile operation chamber, thus obtaining the natural talcum powder. The natural talcum powder is harmless and non-toxic to human bodies, is not prone to get mould and is a high-quality natural talcum powder cosmetic material.
Description
Technical field
The present invention relates to a kind of ultra-fine microcrystalline cellulose talcum powder, specifically, relating to a kind of ultra-fine microcrystalline cellulose particle diameter is the talcum powder below 3.0 microns.
Background technology
The talcum powder product in past is many to be prepared with Pulvis Talci.Pulvis Talci belongs to monoclinic system, is phosphorus sheet, foliaceous more, and microgranule is soft and soapy feeling arranged; Mohs' hardness is 1, is one of minimum mineral of nature hardness, and Main Ingredients and Appearance is that silicon dioxide, magnesium oxide are main; Other contains small amounts magnesium, calcium oxide, aluminium oxide, whiteness 94～96.
Though Pulvis Talci has the effect that makes skin smooth, can fill and lead up pore.But, find that in the recent period in a single day Pulvis Talci gets into health, and woman organs such as ovary are had ill effect as a kind of industrial chemicals; Be applied on the condom with Pulvis Talci, can cause the generation of female reproduction tumor, after Pulvis Talci gets into the person, can influence the normal function of organs such as bladder, kidney, lung, also can lunge Eye Ear Nose And Throat, also can make skin allergy, especially infant.
Recently have the talcum powder of production producer to make the talcum powder material with starch or distortion starch, its toxicity to human body greatly descends.But it is mouldy that the starch based talcum powder is prone to, and causes product perishable.
The present invention provides a kind of material of making talcum powder with ultra-fine microcrystalline cellulose.Microcrystalline Cellulose is with β-1, and the bonded straight chain formula of 4-glucoside polysaccharide is that native cellulose hydrolysis in acid medium makes molecular weight be reduced to the particulate powder product of certain limit.Therefore functions such as microcrystalline Cellulose has viscosity adjustment, promotes into glue, textile finishing, effect suspension stabilization, alternative fats, agglomeration resistance have extensive use in industries such as medicine, cosmetics.
The degree of crystallinity of microcrystalline Cellulose, molecular weight and the degree of polymerization are except that outside the Pass having with the used raw material of production, and be also relevant with the processing method and the working depth of product.The granularity of microcrystalline Cellulose is different, and its purposes is also different.Particle diameter is that the microcrystalline Cellulose of 15 μ m-200 μ m can be used as filler, binding agent, adsorbent, anti-caking agent, is mainly used in pharmaceutical industry; 8 μ m-15 μ m can be used as fat substitute, dietary fiber etc.; Microcrystalline Cellulose is more in the market; Granularity is generally about 30 μ m-100 μ m; But microcrystalline Cellulose is during as the purposes such as thickening stabilizing agent of the emulsion stabilizer of the pharmaceutic adjuvants such as excipient of food additive such as food emulsion stabilizer, specific drugs, cosmetics, coating; Granularity to microcrystalline Cellulose is had higher requirement, in the hope of obtaining better stable and result of use.
Ultra-fine microcrystalline cellulose is to make with extra care the ultra-fine natural particle that forms by the Plant fiber through acid hydrolysis, and particle diameter can be spherical, oval and bar-shaped between 0.2 μ m～3.0 μ m.For example: particle diameter is 0.3 μ m; Length 2.0 μ m or particle diameter 0.4 μ m; The ultra-fine microcrystalline cellulose rod-shaped particle of length 1.0 μ m, or particle diameter is 2.0 μ m, and length is the ultra-fine microcrystalline cellulose spherical particle of 2.0 μ m; And particle diameter is 3.0 μ m, and length is the ultra-fine microcrystalline cellulose ellipticity particle of 2.0 μ m etc.
General industry microcrystalline Cellulose particle diameter has sphere, ellipse or bar-shaped between 3 μ m～50 μ m.The industrial microcrystalline Cellulose element of food grade meets U.S. FDA pharmacopeia and Chinese Pharmacopoeia; Use it on medicine and the food additive, because it is it belongs to natural product, harmless to human non-toxic; Therefore unrestricted on addition; General industry microcrystalline cellulose crude granule is thicker, and water absorption is not high, should not make talcum powder to the bright and clean flexibility difference of skin.
The ultra-fine microcrystalline cellulose raw material is taken from natural materials such as Cotton Gossypii, fiber crops, paper pulp, existing suitability for industrialized production product.Particle diameter is that the ultra-fine microcrystalline cellulose of 0.2 μ m～3.0 μ m is except that the safety to human body, because big specific surface area and high hygroscopicity are arranged.For example, when the ultra-fine microcrystalline cellulose of the above-mentioned particle diameter more than 5% is well-dispersed in the water, can make water form gel.After being applied on the skin, can adsorbing skin surface moisture rapidly, and form small gel as talcum powder; Fill skin pore, also keep moisture content to be difficult for scattering and disappearing, make skin bright and clean soft and smooth; At this moment, particle diameter is that the superfine microcrystal fiber of 0.2 μ m～3.0 μ m can form bigger granule and comes off from skin, and takes away the booty on the skin; Thereby be the good material of making natural talcum powder, especially be fit to infant and use.
Summary of the invention
The purpose of this invention is to provide a kind of natural talcum powder, it is characterized in that: this natural talcum powder is to utilize the ultra-fine microcrystalline cellulose granule to pack in aseptic processing room through vacuum drying, ultraviolet sterilization, after sieving to be prepared from.
Said ultra-fine microcrystalline cellulose particle grain size is between 0.2 μ m～3.0 μ m.
Said ultra-fine microcrystalline cellulose coating of particles is sphere, ellipse or rod-shaped particle.
The composition of said natural talcum powder is 100% said ultra-fine microcrystalline cellulose granule.
Be weight percentage 99.99% said ultra-fine microcrystalline cellulose granule and percentage by weight of the composition of said natural talcum powder is 0.01% natural essence or compound essence.
Said ultra-fine microcrystalline cellulose granule is
product that U.S. FMC BioPolymer company produces, and its product type is RC-591.
The purpose of this invention is to provide a kind of method for preparing natural talcum powder, it is characterized in that: process through the ultra-fine microcrystalline cellulose granule is packed in aseptic processing room through vacuum drying, ultraviolet sterilization, after sieving.
Said sieving was meant 50 mesh sieves.
Said ultra-fine microcrystalline cellulose particle grain size is between 0.2 μ m～3.0 μ m.
The method of the natural talcum powder of described preparation is characterized in that: before packing, in the ultra-fine microcrystalline cellulose granule, add percentage by weight and be 0.01% natural essence or compound essence.
The irradiation-induced degradation of microcrystalline Cellulose is intended to reduce the molecular weight of microcrystalline Cellulose, destroys the hydrogen bond between the microcrystalline Cellulose crystallite district, makes follow-up mechanical crushing process carry out more easily.Irradiation-induced degradation can adopt 60Co-gamma-rays or electron beam irradiation among the present invention; The scope of irradiation dose is 1-50kGy; In order to reduce irradiation dose; Can select sensitizer to promote the irradiation-induced degradation of microcrystalline Cellulose, irradiation sensitization degradation samples can be handled with washing, the drying process of routine.
Microcrystalline Cellulose belongs to the very strong material of toughness; Conventional mechanical crushing method is difficult to it is carried out superfine grinding; General microcrystalline Cellulose manufacturer uses comminution by gas stream also can only microcrystalline Cellulose be pulverized about 180 orders, is difficult to break through 200 purpose bottlenecks.Research worker of the present invention is passed through conventional mechanical crushing method such as ball milling, colloid mill, comminution by gas stream to the microcrystalline Cellulose of handling through radiation degradation, and preferred comminution by gas stream drops to its particle diameter about 10 μ m.
In order further to improve the result of use of microcrystalline Cellulose, chemical degradation method can be used or/and mechanical activation comminution further reduces the granularity of microcrystalline Cellulose.Chemical degradation method adopts and the irradiation sensitization similar reaction system of degrading among the present invention, microcrystalline Cellulose is dispersed in the aqueous solution of sensitizer, and at 25 ℃-100 ℃, under preferred 60 ℃-90 ℃, reaction 1h-72h, preferred 6h-24h.Microcrystalline Cellulose granularity through chemical degradation can be reduced to below the 10 μ m, and the microcrystalline Cellulose of preferred 2 μ m-8 μ m is widely used in fields such as food additive, pharmaceutic adjuvant.
In chemical degradation and the aforementioned irradiation-induced degradation, said sensitizer is the material that produces strong oxidative free radical easily through the gamma-rays radiolysis, like strong oxidizer, strong acid or highly basic.Said strong oxidizer is hydrogen peroxide or persulfate, like sodium peroxydisulfate, Ammonium persulfate., potassium peroxydisulfate etc.Said strong acid is mineral acid or organic acid, mineral acid, and example hydrochloric acid, sulphuric acid, nitric acid etc., organic acid is like acetic acid, citric acid, lactic acid etc.Said highly basic is sodium hydroxide, potassium hydroxide etc.
The mechanical activation comminution that adopts in order further to improve the result of use of microcrystalline Cellulose is that the mechanical crushing method through routines such as ball milling, colloid mill, comminution by gas stream carries out.
The method for preparing of ultra-fine microcrystalline cellulose of the present invention, it processes the ultra-fine microcrystalline cellulose of particle diameter less than 3 μ m through microcrystalline Cellulose being degraded and ultra-fine processing.
The said irradiation-induced degradation that is degraded to, the said ultra-fine mechanical activation comminution that is treated to preferably, after said degraded and ultra-fine processing, is also carried out mechanical activation comminution or/and chemical degradation carries out.
Irradiation-induced degradation can adopt 60Co-gamma-rays or electron beam irradiation among the present invention, and the scope of irradiation dose is 1-50kGy.In order to reduce irradiation dose, can select sensitizer to promote the irradiation-induced degradation of microcrystalline Cellulose, irradiation sensitization degradation samples can be handled with washing, the drying process of routine.
Research worker of the present invention is passed through conventional mechanical crushing method such as ball milling, colloid mill, comminution by gas stream to the microcrystalline Cellulose of handling through radiation degradation, and preferred comminution by gas stream drops to its particle diameter about 10 μ m.
In order further to improve the result of use of microcrystalline Cellulose, mechanical activation comminution can be used or/and chemical degradation method further reduces the granularity of microcrystalline Cellulose.Chemical degradation method adopts and the irradiation sensitization similar reaction system of degrading among the present invention, microcrystalline Cellulose is dispersed in the aqueous solution of sensitizer, and at 25 ℃-100 ℃, under preferred 60 ℃-90 ℃, reaction 1h-72h, preferred 6h-24h.Microcrystalline Cellulose granularity through chemical degradation can be reduced to below the 10 μ m, and the microcrystalline Cellulose of preferred 0.2 μ m-3 μ m is used for the talcum powder field.
In chemical degradation and the aforementioned irradiation-induced degradation, said sensitizer is the material that produces strong oxidative free radical easily through the gamma-rays radiolysis, like strong oxidizer, strong acid or highly basic.Said strong oxidizer is hydrogen peroxide or persulfate, like sodium peroxydisulfate, Ammonium persulfate., potassium peroxydisulfate etc.Said strong acid is mineral acid or organic acid, mineral acid, and example hydrochloric acid, sulphuric acid, nitric acid etc., organic acid is like acetic acid, citric acid, lactic acid etc.Said highly basic is sodium hydroxide, potassium hydroxide etc.
The mechanical activation comminution that adopts in order further to improve the result of use of microcrystalline Cellulose is that the mechanical crushing method through routines such as ball milling, colloid mill, comminution by gas stream carries out.
Particle diameter provided by the invention can be applicable to prepare in the field of talcum powder less than the ultra-fine microcrystalline cellulose of 3 μ m.
Because the aggregation force between the cellulose microcell is very strong, in the conventional biodegrading process, the most frequently used and effective biodegrading process is high temperature, strong acid or highly basic and usefulness, and these harsh conditions are very big to the infringement of equipment and environment, and yield is also very low.The present invention utilizes ray can penetrate the characteristics that the cellulose crystallite district makes cellulose degradation, in conjunction with radiation degradation and mechanical activation comminution technology, the mean diameter of microcrystalline Cellulose is reduced to about 10 μ m from 50 μ m-100 μ m, and yield is up to more than 95%.Combine with traditional chemical degradation technology, then can make the microcrystalline Cellulose particle diameter be reduced to nanoscale.Therefore, the present invention can be provided in the full size scope of nanometer-submicron-micron, the ultra-fine microcrystalline cellulose of adjustable grain control.
Ultra-fine microcrystalline cellulose is compared with ordinary microcrystalline cellulose; Major advantage is: the dispersibility and the bin stability that in water, have height; Have better figuration, bonding, imbibition, thickening, thixotropy effect, so the scope of application and result of use are superior to ordinary microcrystalline cellulose.Utilize its thixotropy and thickening property; Ultra-fine microcrystalline cellulose in cosmetics industry as the thickening emulsion stabilizer; Can make product more stable, fine and smooth, have the effect of massage, clean skin when being used for products such as Cleansing Foam concurrently, have the effect of physical sunscreen agent when being used for sunscreen product concurrently; Microcrystalline Cellulose is the pure natural component, and polysaccharide natural polymer glue is compound with gathering, and can be used for senior cleaning, skin care item and baby's cleaning, skin care item etc. and requires the little cosmetics of skin irritation.In preparation talcum powder field, the particle diameter of ultra-fine microcrystalline cellulose is required particularly harsh, in general, the particle diameter that is used to make the ultra-fine microcrystalline cellulose of talcum powder should most preferably be 0.2-3.0 μ m below 3.0 μ m.
When the ultra-fine microcrystalline cellulose below the particle diameter more than 5% is 3.0 μ m is well dispersed in the water, can make water form gel.Using particle diameter is after talcum powder that the ultra-fine microcrystalline cellulose below the 3.0 μ m is processed is applied on the skin, absorption skin surface moisture rapidly, and form small gel; Fill skin pore, also keep moisture content to be difficult for scattering and disappearing, make skin bright and clean soft and smooth; And can form bigger granule and come off from skin; And take away the booty on the skin, thereby be the good material of making natural talcum powder, especially be fit to infant and use.
Particle diameter is thicker greater than the ultra-fine microcrystalline cellulose granule of 3.0 μ m, and water absorption is not high, to the bright and clean flexibility difference of skin and non-suitable for making talcum powder.It is higher that particle diameter prepares cost less than the ultra-fine microcrystalline cellulose of 0.2 μ m; Can cause the cost of talcum powder to rise; And particle diameter directly gets into tissue and blood through skin easily less than the ultra-fine microcrystalline cellulose of 0.2 μ m, though ultra-fine microcrystalline cellulose is a pure natural plant fiber, human body is not necessarily had injury; But to be on the safe side, still utilize particle diameter more suitable greater than the ultra-fine microcrystalline cellulose of 0.2 μ m.
The specific embodiment
Following examples further specify content of the present invention, but should not be construed as limitation of the present invention.
The prescription of talcum powder of the present invention is following:
Prescription 1: ultra-fine microcrystalline cellulose (bar-shaped), ultra-fine microcrystalline cellulose percentage by weight are 100%
Wherein, superfine microcrystal particle diameter 0.2 μ m, length 2.0 μ m
Prescription 2: ultra-fine microcrystalline cellulose (bar-shaped), ultra-fine microcrystalline cellulose percentage by weight are 100%
Wherein, superfine microcrystal particle diameter 0.3 μ m, length 2.0 μ m
Prescription 3: ultra-fine microcrystalline cellulose (bar-shaped), ultra-fine microcrystalline cellulose percentage by weight are 100%
Wherein, superfine microcrystal particle diameter 0.4 μ m, length 1.0 μ m
Prescription 4: ultra-fine microcrystalline cellulose (bar-shaped), ultra-fine microcrystalline cellulose percentage by weight are 100%
Wherein, superfine microcrystal particle diameter 0.5 μ m, length 1.5 μ m
Prescription 5: ultra-fine microcrystalline cellulose (ellipticity), ultra-fine microcrystalline cellulose percentage by weight are 100%
Wherein, superfine microcrystal particle diameter 3.0 μ m, length 2.0 μ m
Prescription 6: ultra-fine microcrystalline cellulose (spherical), ultra-fine microcrystalline cellulose percentage by weight are 100%
Wherein, superfine microcrystal particle diameter 2.0 μ m, length 2.0 μ m
Can also add percentage by weight in the superfine microcrystal among the above-mentioned prescription 1-6 and be 0.01% natural essence or compound essence, thereby form the natural talcum powder product of commercialization band fragrance.
That ultra-fine microcrystalline cellulose of the present invention preferably includes is bar-shaped, ellipticity and spheroid, can also comprise the shape that other are suitable.
Ultra-fine microcrystalline cellulose of the present invention can be bought
product from U.S. FMC BioPo lymer company; Its model is RC-591, and the ultra-fine microcrystalline cellulose particle grain size of this model is 0.2-3.0 μ m.
Ultra-fine microcrystalline cellulose of the present invention also can prepare through following method:
Embodiment 1: the preparation of ultra-fine microcrystalline cellulose
The commercially available microcrystalline Cellulose that with the 40kg mean diameter is 50 μ m carries out superfine grinding with Co-60 gamma-ray irradiation 50kGy with jet mill, obtains the ultra-fine microcrystalline cellulose that mean diameter is 10 μ m.
Embodiment 2: the preparation of ultra-fine microcrystalline cellulose
With the mean diameter of the above-mentioned preparation of 1kg is ultra-fine microcrystalline cellulose and the blending of 5kg pure water of 10 μ m, behind wet milk grinding 30min, with its vacuum drying, obtains the ultra-fine microcrystalline cellulose that mean diameter is 8 μ m.
Embodiment 3: the preparation of ultra-fine microcrystalline cellulose
With the mean diameter of embodiment 1 is that the ultra-fine microcrystalline cellulose of 10 μ m mixes by following rate of charge: 400g microcrystalline Cellulose, 1440mL hydrochloric acid, 160mL sulphuric acid, 2400mL pure water.React 24h down at 95 ℃.The product that obtains with sodium hydroxide neutralization, washing, is obtained the ultra-fine microcrystalline cellulose that mean diameter is 5 μ m after last centrifugalize, the spray drying.
Embodiment 4: the preparation of ultra-fine microcrystalline cellulose
The ultra-fine microcrystalline cellulose that with above-mentioned mean diameter is 8 μ m mixes by following rate of charge: 200g microcrystalline Cellulose, 600mL hydrochloric acid, 500mL hydrogen peroxide, 1400mL pure water.After 70 ℃ are reacted 60h down, add the 50g potassium peroxydisulfate, be warming up to little boiling, stir 12h.The product that obtains with sodium hydroxide neutralization, washing, is obtained the ultra-fine microcrystalline cellulose that mean diameter is 0.2-3.0 μ m behind last centrifugalize, the vacuum drying.
The application of ultra-fine microcrystalline cellulose of the present invention in cosmetics:
Respectively with microcrystalline Cellulose rubber cement (solid content 20%) 120g of embodiment 1,2,3,4 and commercially available particle diameter 50 μ m and CMC solution (solid content 1%) 5600g with colloid mill mix, homogenizing; Obtaining microcrystalline Cellulose and CMC part by weight is 30: 70, and solid content is 8% thickening emulsion stabilizer A.
With glyceryl stearate 137g, hexadecanol 46g, cocoyl sodium lactate 33g, glycerol 621g, lanolin alcohol 131g; Mix and be heated to 75 ℃ make its dissolving after; Mix with 375g thickening emulsion stabilizer A, 300g water, homogenizing; After being cooled to room temperature, add antiseptic 10g, essence 10g mixing, homogenizing, obtain Cleansing Foam salubrious, gentle, good stability.The viscosity of these Cleansing Foams etc. are measured the result, and are as shown in table 1 below.
Thickening emulsion stabilizer application results in Cleansing Foam that table 1 different-grain diameter microcrystalline Cellulose makes
Annotate: viscosity with the measurement of brookfield viscometer (the 63# rotor, 30rpm).
Visible by table 1; Gained ultra-fine microcrystalline cellulose of the present invention is compared with commercially available microcrystalline Cellulose, and when being used for Cleansing Foam and preparing, products obtained therefrom is more fine and smooth, stability is better, viscosity is higher; Has the irreplaceable effect of ordinary microcrystalline cellulose; Especially particle diameter is the microcrystalline Cellulose of 2.0 μ m, still can keep fine and smooth, homogeneous phase after the week, and effect is best.
The thickening emulsion stabilizer that contains ultra-fine microcrystalline cellulose by this experimental example obtains can be used for various types of cosmetics such as cleansing milk, moisturizing emulsion, shampoo, has characteristics such as salubrious, gentle, good stability and zest are low.
The method for preparing of natural talcum powder of the present invention is following:
Embodiment 1:
With the ultra-fine microcrystalline cellulose of 0.2～3.0 μ m of the foregoing description 4 preparation, vacuum drying behind the ultraviolet sterilization, is crossed 50 mesh sieves, removes the impurity in the ultra-fine microcrystalline cellulose, in the aseptic processing room inner packing, promptly gets the natural talcum powder product of commercialization.Why adopt ultraviolet sterilization, be in the high temperature sterilization high temperature to the ultra-fine microcrystalline cellulose Effect on Performance.
Embodiment 2:
Operation is with embodiment 1, in the ultra-fine microcrystalline cellulose of 0.2-3.0 μ m, adds 0.01% natural essence or compound essence before the packing, cross 50 mesh sieves after, in the aseptic processing room inner packing, promptly and the natural talcum powder product of commercialization band fragrance.
Embodiment 3:
To be
ultra-fine microcrystalline cellulose granule of RC-591 from the model that U.S. FMC BioPolymer company buys; Its particle diameter 0.2-3.0 μ m; This ultra-fine microcrystalline cellulose is carried out vacuum drying; Behind the ultraviolet sterilization, cross 50 mesh sieves, remove the impurity in the ultra-fine microcrystalline cellulose; In the aseptic processing room inner packing, promptly get the natural talcum powder product of commercialization.Why adopt ultraviolet sterilization, be in the high temperature sterilization high temperature to the ultra-fine microcrystalline cellulose Effect on Performance.
Through test shows, after the talcum powder that utilizes the ultra-fine microcrystalline cellulose of 0.2～3.0 μ m of the present invention to process is applied on the skin, absorption skin surface moisture rapidly; And form small gel, and fill skin pore, also keep moisture content to be difficult for scattering and disappearing; Make skin bright and clean soft and smooth, at this moment, the superfine microcrystal fiber can form bigger granule and come off from skin; And take away the booty on the skin, thereby be the good material of making natural talcum powder, especially be fit to infant and use.And general industrial microcrystalline Cellulose particle diameter is more than 3 μ m, and its granule is thicker, and water absorption is not high, to the bright and clean flexibility difference of skin and non-suitable for making talcum powder.Because too tiny, at first the preparation cost that gets up is higher, can cause the cost of talcum powder to rise less than the ultra-fine microcrystalline cellulose of 0.2 μ m for particle diameter; Secondly since its particle diameter less than 0.2 μ m; Directly get into tissue and blood through skin easily,, human body is not necessarily had injury though ultra-fine microcrystalline cellulose is a pure natural plant fiber; But to be on the safe side, still utilize particle diameter more suitable greater than the ultra-fine microcrystalline cellulose of 0.2 μ m.
Claims (10)
1. natural talcum powder is characterized in that: this natural talcum powder is to utilize the ultra-fine microcrystalline cellulose granule to pack in aseptic processing room through vacuum drying, ultraviolet sterilization, after sieving to be prepared from.
2. natural talcum powder as claimed in claim 1 is characterized in that: said ultra-fine microcrystalline cellulose particle grain size is between 0.2 μ m～3.0 μ m.
3. natural talcum powder as claimed in claim 1 is characterized in that: said ultra-fine microcrystalline cellulose coating of particles is sphere, ellipse or rod-shaped particle.
4. natural talcum powder as claimed in claim 1 is characterized in that: the composition of this natural talcum powder is 100% said ultra-fine microcrystalline cellulose granule.
5. natural talcum powder as claimed in claim 1 is characterized in that: be weight percentage 99.99% said ultra-fine microcrystalline cellulose granule and percentage by weight of its composition is 0.01% natural essence or compound essence.
6. like one of them described natural talcum powder of claim 1-5; It is characterized in that: said ultra-fine microcrystalline cellulose granule is
product that U.S. FMC BioPolymer company produces, and its product type is RC-591.
7. method for preparing natural talcum powder is characterized in that: process through the ultra-fine microcrystalline cellulose granule is packed in aseptic processing room through vacuum drying, ultraviolet sterilization, after sieving.
8. the method for the natural talcum powder of preparation as claimed in claim 7 is characterized in that: said sieving was meant 50 mesh sieves.
9. the method for the natural talcum powder of preparation as claimed in claim 7 is characterized in that: said ultra-fine microcrystalline cellulose particle grain size is between 0.2 μ m～3.0 μ m.
10. the method for the natural talcum powder of preparation as claimed in claim 7 is characterized in that: before packing, in the ultra-fine microcrystalline cellulose granule, add percentage by weight and be 0.01% natural essence or compound essence.
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| CN103230355A (en) * | 2013-05-06 | 2013-08-07 | 中国国旅贸易有限责任公司 | Sunscreen cream cosmetic composition containing nano crystal cellulose |
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