CN1151181A - Process for stamping detergent bars - Google Patents

Abstract

A device for stamping a detergent bar, i.e. a bar comprising soap, a synthetic detergent active or a mixture thereof, includes a die. The die has at least one bar stamping surface provided with at least one elastomeric coating (5, 6) having a thickness of less than 200 microns.

Description

The process for stamping of detergent bar

The present invention relates to adopt a kind of mould is utensil, the method and apparatus of the goods of definite shape with the plastic material drawing.Specifically, it relates to the process for stamping of detergent bar.

So-called " detergent bar " refers to a kind of ingot shape, garden cake or bar, and wherein tensio-active agent comprises soap, synthetic detergent activeconstituents or its mixture, content account for the 20wt% at least of this bar.

In the manufacturing processed of detergent bar, typical way is that the pre-formation composition that will contain this detergent bar all the components is successive " bar " through a shape of the mouth as one speaks extrusion molding, is cut into the segment of predetermined length then, so-called " ingot ".With this " ingot " feeding stamping machine, another kind of way is to adopt subsequently, and for example the mould that size is identical with this billot surface is to its one or more surface imprint, and for example press with the mould of punch die or drum-shape on the surface of the briquetting material of exerting oneself during impression.

Stamping machine typically comprises a mould that is made of two half modules, and each half module has a surface that contacts with ingot when punching operation.Apart predetermined distance when closing up is made on the surface of these two half modules, compresses thereby ingot placed between these two half modules, gives final shape of billot and outward appearance, and then opens.Surplus composition is closed up along with two half modules and is extruded outside the mould.Usually this part material is called " overlap ".Subsequently, allow billot pass through hole on " defining plate ", overlap is separated from soap bar.

Traditional die-punch machine comprises " pin mould " forming mill, wherein a pair of module that faces one another or half module are harmonious in compacting step each other, and " box mould " forming mill, wherein when compacting, the billot punching press is not but closed within the through hole that is clamped in a box frame for a pair of module that faces one another, and the circumferential surface of billot is being limited by box frame around here.

Each half module usually has a matrix or claims the liftout inserts, and they remain the state of gathering by spring usually in half module, but can strut by pressurized air or mechanical means, to assist the billot demoulding.In the process that half module closes up, can vacuumize, ensconce the air in the die cavity between detergent bar and the die face so that discharge, under the situation of rotating mold, the vacuum that is applied helps to make in rotary course billot to keep being in the proper place.

Adopt mould to come the stamping detergent bar, in order that give its reproducible shape, slick surface and/or a kind of pattern on its part surface impression at least, for example corporate logo, trade mark or similarly picture and text.

Yet because the sticking to mould tool, promptly a certain amount of remaining washing composition is stayed in the middle of the half module in the continuous use of mould and continuous cumulative result, and the soap bar after the shaping usually has visible defects from the teeth outwards, and perhaps soap bar can't break away from from die surface.

Many schemes that address these problems had once been proposed.A kind of scheme relates in the punching operation process implements quenching to half module.

Another kind of scheme is disclosed among the GB-A-746 769, and the document discloses a mold, comprises that a Die Box and a pair of usefulness contain the matching die part that the polymkeric substance plastic material of regulation Young's modulus is made.The shortcoming of this system is to need to use releasing agent, be bonded on the mould and constantly accumulation to prevent washing composition, thereby the soap bar surface that extrudes after making has fault.

Also have a kind of scheme to be disclosed among the EP 276 971, two mold components are used in suggestion, and each parts comprises an inelastic body part and an elastomerics part.The elastomerics part, promptly the part of contact soap bar during punch process comprises the elastomer coating of at least 200 micron thickness, Young's modulus scope up to specification.

Thick coating, that for example advises above reaches coating more than 200 microns, and its shortcoming is need such coating could be added to mould by the method for casting or molding to get on.Way as an alternative is molded as independent part earlier, then they is assembled into mould and gets on.This molding methods relates to makes a kind of mould, digs out a cavity also darker than the projected depth of soap bar on this mould.And, need a kind of independent spreading implement to be coated with the liftout inserts toward contact.

In the process of coating curing, usually shrink, although shrinkage is very little, the variation of shape can make between mould and the liftout inserts and the gap occur.

As seen, the manufacturing of thick coating mould is a kind of complexity and expensive process.And, though coating die again, exist many difficulties that interrelate with this method, promptly require to have the mixing and compo of specific equipment, air can be sneaked in this elastomerics in coating process again, but also need drain unnecessary elastomerics.Consider above-mentioned all difficulties, as a rule, need to use the expensive specific equipment that only has just now usually on ground away from the detergent bar manufacturing facility.

Each elastomeric septum that provides one deck to tighten along the half module surface in two half modules of soap mould is provided in U.S. Patent number 5 269 997 suggestions.This system uses very complicated under the speed that commercial production requires, and the very thin illiteracy film of one deck is torn easily, and the corporate logo replication performance that expection is produced is very poor.

We have now found that a kind of so alternative utensil that can be used to produce soap bar, and its surface decoration can be finished according to a kind of reproducible mode of easy row.

Hereinafter " surface decoration " speech of indication refers to a kind of shape unanimity, ganoid pattern, for example corporate logo, trade mark or similar picture and text.

Therefore, according to the present invention, provide a kind of utensil that is used for the stamping detergent bar, comprise a kind of mould, this mould has at least one soap bar stamping surface, and wherein this soap bar stamping surface has elastomer coating, and the total thickness of this elastomer coating is less than 200 microns.

In preferred embodiments, this elastomer coating is the unique elastomer material of soap bar stamping surface.

According to the present invention, " elastomerics " refers to a kind of material that is defined as " elastomerics " or " rubber " in ISO (International Standards Organization) 1382.Be included in according to thermoplastic elastomer and multipolymer in addition in the definition of " elastomerics " of the present invention material, and the blend of elastomerics, thermoplastic elastomer and rubber.

Elastomeric definition is to have long flexible chain, be independently in raw material, transform the polymkeric substance of formation cross-linked network structure by vulcanizing agent or linking agent introducing cross-link bond.This net structure has kept the reactivity of macromolecular chain molecule, and the result returns to approximate its original size and dimension rapidly after removing because of stress deformation and this external force.

Along with the rising of temperature, elastomerics experiences a kind of rubber phase and keeps its elasticity and Young's modulus after deliquescing, until arriving decomposition temperature.

Thermoplastic elastomer is made up of amorphous phase and crystalline phase.The softening range of amorphous phase is lower than room temperature, thus play a part a kind of spring, and crystallization segmental softening temperature is higher than room temperature, plays a part cross-linking set.

Preferably be selected from those ranks of stipulating among ASTM (ASTM (American society for testing materials)) D1418 according to elastomer material of the present invention, comprise:

1. unsaturated carbon chains elastomerics (R level) comprises natural rubber, for example Standard Malasian rubber; Divinyl, " fourth sodium " type for example, Bunawerke Huls company product, and butadiene acrylonitrile copolymer, for example " Perbunan ", Bayer AG's product.

2. saturated carbon chains elastomerics (M level) comprises second third type, for example " Nordel ", and E.I.Du Pont Company produces, and fluorine-containing type, and for example " Viton ", E.I.Du Pont Company produces.

3. the silicone elastomer of Qu Daiing (Q level) comprises the fluid silicone rubber class, Silastic 9050/50P (A+B) for example, and Dow Corning company produces.

4. contain the elastomerics (U level) of carbon, nitrogen and oxygen in the polymer chain, comprise polyurethanes, for example the urethane of Belzona company product.

Adopt the situation of the suitable elastomer coating that various materials obtain as follows: for example use fluid silicone rubber, as Silastic 9050/50P A+B (Dow Coming company products), after vulcanizing, the Young's modulus of coating is about 2-3MPa (MPa); For example use urethane again, as Belzona PU2221, as cited below, the Young's modulus of its coating is about 9MPa after solidifying, and Belzona2131 (MP Fluid Elastomer), it is a kind of based on ditane-4,4 '-vulcabond (MDI) system, and two parts of goods forming in conjunction with neodecanoic acid benzene mercury ester catalyst.

To as " elastomerics " material of defining below can carry out pre-treatment, for example, make a kind of commercially available elastomeric solution earlier being applied to as coating before die surface gets on.This elastomerics, rubber and multipolymer and blend thereof usually solidify or crosslinked on the spot at die surface.For example, comprise foundation elasticity body material, linking agent and other materials, for example promotor at interior various compositions, can be mixed before as the coating coating in advance.Be applied to after mould gets on, coating is solidified on the spot.Solidification process can be by heating or other accelerated methods, and means such as for example pressurization, radiation or uviolizing are quickened.

In some cases, various compositions can be dissolved in the appropriate solvent, be applied on the mould, then solvent be driven away.

Under the situation of using thermoplastic material, they heating can be become molten state, be applied on the mould cooling and curing then again.

Be suitable as the material of elastomer coating of the present invention, its preferred Young's modulus scope is 0.1-50MPa, most preferably is 1-35MPa.

The elasticity modulus measuring method of elastomer coating is to be recorded in the needed power of impression and the corresponding with it sunken degree of depth of pressure on the coating.Say that typically can use the pressure head of an end as sphere, obtaining with power is the longitudinal axis, pressing 3/2 power that falls into the degree of depth is the slope of a curve that transverse axis has been done, s.Pressing and falling into the degree of depth is to count pressure head to its inner distance that moves from just contacting coatingsurface.Usually, need fall into the compliance correction that depth value carries out metering facility to the pressure that records.In other words, the actual relation of the apparent numerical value that falls into the degree of depth and record of pressing is as follows:

D=d '-(F.C) wherein F is an indentation force.The mensuration of compliance C is that pressure head is propped up rigid surface compression and notes apparent displacement and corresponding external force, and the slope of a curve that is constituted is C.Elastic modulus E is calculated by following formula: $E=\frac{3}{4}.S.\frac{1}{\sqrt{R}}.(1-b^2)$ S=F/d wherein ^3/2, R is the sphere end radius of pressure head, b is the Poisson's ratio of coating, equals about 0.5 for this ratio of elastomerics.

Under the condition that will illustrate below some, above-mentioned impression method may draw the Young's modulus numerical value of plus deviation owing to added the influence of the rigid material of coating.In order to ensure the generation of avoiding this class problem, must make the contact radius of pressure head and coating be no more than about 1/10 of coat-thickness.Contact radius, a, the relation that falls into the degree of depth is as follows with pressing:

s＝√ dR

For less than the thick coating of 200 μ m, to advise using the nano-indentation hardness meter, it utilizes the little pressure head of end radius, the indentation force when the little pressure of energy measurement falls into the degree of depth.The example of this equipment is " NanoIndenter II " (Nano-instruments company).The alternate way is the thick test coating of preparation (surpassing 200 μ m), so that can adopt comparatively habitual metering facility, for example Instron (Instron) tester (as 5566 types).

Advantage according to utensil of the present invention is in the factory very thin one deck elastomer coating to be imposed on the traditional moulds that itself has icon at an easy rate.For example can adopt and brush or spraying technology, realize as spraying by air, airfree or electrostatic.Necessary, also can use the combination of various technology.Every occasion that need impose the coating of different thickness in the different piece of mould may just must be done like this.For example, if require special thickness in the fine portion of die surface, for example at the position of icon, just can adopt spraying technology, from die ontology take out spraying with icon liftout inserts this moment.

According to the kind of elastomer material, coating can be cured on the surface at mould under the temperature of room temperature or raising.Can adopt higher temperature that the solvent in the elastomerics that contains solvent is driven out of.In order to accelerate solidification process, can adopt other method, for example ultraviolet light polymerization.

Another advantage of the present invention is elastomer coating can be imposed on traditional mould.Therefore, the common way when not needing as the employing thick coating must be made new mould.For thick coating, typical situation is, when become along with use wearing and tearing or damage and cause of elastomer portion, when for example the detergent bar that comes out of punching press has cut, just has to coating is removed; Use specific equipment that mold cleaning is clean, prepare new coating and also be molded onto again on the surface of mould.In contrast, utensil of the present invention can be easy to and simply at the original place recoat, only need, for example by mechanical means, by suitable chemical treatment (for example adopting the solution of potassium hydroxide in ethanol and toluene mixture under the situation of silicon coating, under the situation of urethane, using ethanol and/or methyl alcohol), dispose old coating again, handle the surface of mould, replace old coating to get final product with novel material then.Do like this, no matter the production time from expending, still the cost consideration from recoat all is sizable saving.

This mould preferably includes and is selected from metal or its alloy, for example brass and other copper alloys and the steel that comprises carbon steel and stainless steel; And other non-elastomeric material, for example thermoset and thermoplastic resin are as polyester, Resins, epoxy, furane resin; Hard casting urethane; Pottery; Matrix material and laminate.

The material that adds, for example filler also can join in this elastomer material and go, to improve its machinery and processing characteristics.The effect of adding filler depends on machinery and the chemical interaction between elastomer material and this filler.

Filler can be used for making the elastomer material modification, so that obtain the character of hope, for example anti tear.Appropriate filler comprises carbon black, silicon-dioxide, silicate and organic filler, for example vinylbenzene or resol.

Other optional additives comprise friction improver and oxidation inhibitor.

The preferred thickness range of elastomer coating is 1 to less than 200 microns, better 10-150 micron, preferably 15-100 micron at least.When thickness was lower than 1 micron, elastomer coating may not accomplish to cover equably die surface.When thickness surpasses 200 microns, may be difficult to adopt simple coating technique, for example use brush coating elastomeric coating, and can make icon duplicate not quite clearly.

An advantage of the invention is, the thickness of elastomer coating and hardness can be according to detergent bar composition, processing temperature and/or processing parameters, the distance between the speed of the shape in half module chamber, pressing equipment and two half modules for example, change etc. factor, to meet the requirements of effect, the good demolding performace of detergent bar for example.It is found that for certain specific bar composition, adopt the situation of no icon mould, elastomer coating adopts the thickness of close lower limit in the scope of stipulating above and the modulus of the upper limit, just can reach acceptable demolding performace in addition.Yet,, adopt near the thickness of the upper limit and the modulus of lower limit and can obtain acceptable stripping result at mould pattern complexity or mold shape complicated situation for same composition.Similarly, for the bar composition of more difficult punching press in essence, adopt and to obtain acceptable stripping result near the thickness of the upper limit and the Young's modulus of lower limit.Therefore, the present invention allows to change within the limits prescribed the thickness and the modulus of coating, remains on the advantage that adopts shallow layer in the detergent bar manufacturing processed simultaneously.

Can be used for punching press according to utensil of the present invention and contain the detergent bar of tensio-active agent, this tensio-active agent comprises the mixture of soap or synthetic detergent or soap and synthetic detergent on substantially.It is lower that it especially is fit to be applied to detergent bar, fatty matter content that punching press contains synthetic surfactant soft and/or that be clamminess, for example account for the 63-78wt% of soap bar gross weight, semi-permeable membranes and transparent soap bar and contain skin-protecting agent, the bar of wetting agent, polyvalent alcohol, oils, lipid acid and Fatty Alcohol(C12-C14 and C12-C18) for example.

According to another aspect of the present invention, a kind of method of stamping detergent bar is provided, comprise

I) on the surface of mould, form elastomer coating less than 200 micron thickness;

Ii) detergent bar composition is fed in the mould of step I;

Iii), make it to be configured as the punching press soap bar to the composition punching press in the mould; And

The mode and the mould separating that iv) make this be easy to duplicate according to the surface decoration that extrudes on it.

Preferably, this elastomer coating is attached on the stamping surface of mould by machinery or chemical means, so that improve the bounding force between mould and the coating.

This die surface can stand several pre-treatment before applied elastomer material, to improve the bonding strength between die surface and the coating.These pretreated purposes are to remove fragile frictional belt; the zone of oxidation of metallic surface fragility for example; improve the exposure level between this surface and the coating to greatest extent and/or change this surperficial situation so that increase combinative surface-area, and the surface of before combination, protecting this mould.The technology of share can be divided into three major types:

1. mechanical grinding comprises wire brush, sand papering technology; The shot blastinog technology, for example water, abrasive material, sand and granulated glass sphere spray; Polishing, for example diamond polishing and spark erosion.

2. chemical treatment comprises solvent cleaning, corrosion, for example uses acid corrosion, anodizing, and use priming paint or stickiness bonding chemical, for example silane or siloxanes.

3. high energy surface pre-treatment class: be widely used for nonmetal system, this class technology comprises corona discharge, plasma body and laser technology.

Except that the soap bar stamping surface that is applied to mould, it also is useful elastomer coating being added on other equipment of other parts of decompressor and soap production line.For example it can impose in order to remove on " the defining plate " of extruding bar composition unnecessary on punching press soap bar base plate last, installation mold on it, can also impose on the non-stamping surface of mould.

In conjunction with the accompanying drawings and following nonlimiting examples, the present invention will obtain further instruction.

Fig. 1 is the cross section view of a mould and detergent bar.

Fig. 2 is mould that is in the close position and the cross section view that is stamped in the detergent bar between the two-half die.

Fig. 3 is after the punching operation, is in the cross section view of the mould of its deployed position.

Fig. 4 is the vertical view of the carbon steel half module that uses in the following example.

Fig. 5 expresses the icon that is carved with on the half module that is used for following example.

Fig. 6 is the cross section view by the detergent bar medullary ray that is formed by the die stamping among the Fig. 4 that is carved with icon shown in Fig. 5.

Refer now to the details of accompanying drawing. Fig. 1 represents a mould 1, and it comprises two half modules. Each half module comprises rigid member 2,3. Each half module is in its soap bar stamping surface 9,12 difference flexible body coatings 5,6. On the surface 8,10,11 and 13 of half module, also scribble elastomer coating. On the soap bar stamping surface of the rigid member 3 of a half module with icon 14. (in some cases, two half modules are all with icon). The icon position also scribbles elastomer coating 6.

Fig. 2 represents the mould that is in the close position, wherein in punching press on the detergent bar 4 icon.

After Fig. 3 represents to finish punching press, the mould that is shown in an open position. Owing to had elastomer coating 5, soap blank to be easy to break away from half module 2. Owing to coating 6 has been arranged, has taken off soap blank from second half module 3 and also be easy to.

Fig. 4 represents a half module 15, and it has die cavity 16 and is used for making this half module to aim at and be locked in pin-and-hole 17,18 on the stamping machine. Be with flutedly 19 on the die cavity, the liftout inserts that is carved with icon is placed in the groove. Through hole 20 represents passage, can vacuumize by this passage at the half module duration of work of punching operation.

Fig. 5 represent to have packed into die cavity 16 of the liftout inserts 21 that is carved with icon.

Example

The stamping machine that uses in the example is Binacchi USN 100.

Adopt carbon steel to make a series of half modules and adopt spark erosion to be processed into as shown in Table a series of surface roughness values (Ra), use the acetone degreasing, drop priming is coated a series of different elastomer materials at last.

A series of brass half modules have also been used in the example.Similarly, these half modules are also used the acetone degreasing, and drop priming adds coating at last.

In the example below, elastomer coating is made of urethane or silicone compositions.

The urethane that uses is:

PU-urethane-Belzona 2221 (MP Fluid Elastomer) is based on the packaged product of branch two of tolylene diisocyanate (TDI) and polyvalent alcohol/neodecanoic acid benzene mercury ester catalyst.Add dimethylbenzene to reduce the viscosity of TDI component.The mixture that obtains is subsequently with polyvalent alcohol and catalyst mix and be applied on the mould.Allow the coating on the mould at room temperature solidify on the spot.

PUA-Belzona 2221 through the dimethylbenzene modification, adds polypropylene glycol again as top, to reduce the Young's modulus of coating.With three kinds of compositions, promptly TDI/ dimethylbenzene, polyvalent alcohol/catalyzer and polypropylene glycol are mixed together, and are coated onto mixture on the die surface then and allow its curing.

KE-Kemira Durelast, a kind of single part (packing) system, by with ditane-4,4 '-vulcabond (MDI) is that the isocyanate-terminated polyurethane prepolymer of main component is formed.Coating is imposed on die surface, be exposed to and allow its curing under atmospheric moisture and the normal temperature.

The priming paint that is used for this urethane is Belzona 2921 (Elastomer GP Conditioner), and main component is the MDI/ dichloromethane solution.

Siloxanes material as elastomer coating is:

Si-fluid silicone rubber Silastic 9050-50P divides two parts of A, B, and Dow Coming company produces.In order to prepare coating, these two parts are at room temperature mixed.Subsequently the mixture of gained is brushed at die surface and at 200 ℃ and solidify down.

HS-Silastic HS 500, Dow Coming company produces, a kind of silicone elastomer of peroxide cure.Premixed silicone elastomer and superoxide are dissolved in the petroleum solvent.Then it is brushed on die surface.Heat then to accelerate the curing of system.

To comprise the priming paint that is used for this silicone elastomer (Dow Coming 3-6060) of the dimethyl methyl vinylsiloxane (acetoxyl end-blocking) of 95% methyl iso-butyl ketone (MIBK), 2% ethyl polysilicate, 1% two (acetopyruvic acid) titaniums of isopropoxy and 2%, dilute with petroleum solvent.

The bar composition that uses in the example is as follows:

Prescription A wt%

Anhydrous tallow soap 52.3

Anhydrous coconut soap 29.9

Coconut fatty acid 5.2

Water and submember gather together enough 100

Prescription B wt%

Coco group (cocyl) hydroxyethyl sulfonate 27.00

AMPHORAM C30 5.00

Polyoxyethylene glycol, intermediate molecular weight 33.12

Lipid acid 11.00

Filler 10.00

Sodium stearate 5.00

Water and submember gather together enough 100

Prescription C wt%

Coco group (cocyl) hydroxyethyl sulfonate 49.78

82/18 soap 8.31

Sodium stearate 2.98

Alkyl benzene sulphonate (ABS) 2.02

Stearic acid 20.15

Coconut fatty acid 3.08

Hydroxyethyl sulfonate 4.68

Water and submember gather together enough 100

Example	????1	??2	??3	???4	????5	????6	????7	????8	??1 *	??2 *
											Average surface roughness (Ra)/μ m	??0.8	?3.2	?1.6	??1.6	???3.2	???0.8	??3.2	????-	????-	????-
Coating PUA thickness/μ m	???PU ??16.2	?PUA ?102	??Si ??21	??Si ??21	????HS ???＜10	????PU ????100	??KE ??42	????Si ????25	????- ????-	????- ????-
											Young's modulus MPa	????9	??1	??3	???3	????3	????9	??35	????3	????-	????-
Bar composition	????B	??C	??C	???B	????B	????B	??A	????B	????B	????C
											Sticking to mould/demoulding	????2	??3	??3	???2	????5	????1	??1	????1	????5	????5
The icon replicability	????1	??2	??3	???2	????1	????1	??4	????1	????1	????1
											Stamping machine top speed (per minute piece number)	???70	??20	??70	??70	??＞40	????45	??70	??45	?＜20	?＜20

For example 1-7, use be the carbon steel half module.In example 8 and Comparative Examples 1 ^*With 2 ^*In, use be the brass half module.In Comparative Examples 1 ^*With 2 ^*In, do not apply elastomer coating at die surface.

At all examples and Comparative Examples, sticking to mould/demoulding grade and icon replicability have all been evaluated.

Sticking to mould/demoulding grade is with visual inspection evaluation, and the standard of scoring is, on behalf of soap bar, 1 separate from mould easily, and on behalf of soap bar, 5 be bonded on the mould.

The icon replicability is the detergent bar evaluation that takes off from mould by visual inspection, and the standard of scoring is, the full details of 1 representative icon all is replicated, and 5 representative icon lines are unclear, wherein had some loss in detail at least.

The above results proves, can adopt at die surface and add that the way of shallow layer comes the various item compositions of punching press, and obtain good sticking to mould/stripping feature and icon replicability.Do not having under the situation of elastomer coating, detergent bar can't break away from from mould.

Claims (14)

1. utensil that is used for stamping detergent bar (soap bar), it comprises a mould, and this mould has at least one soap bar stamping surface, has wherein added elastomer coating on this soap bar stamping surface, and the total thickness of this elastomer coating is less than 200 microns.

2. according to the utensil of claim 1, wherein this elastomer coating is the unique elastomer material of this soap bar stamping surface.

3. according to the utensil of claim 1 or 2, wherein this mould comprises rigid material, is selected from metal and alloy thereof, thermoset and thermoplastic resin, hard casting urethane, pottery, matrix material and laminate.

4. according to the utensil of claim 1 or 2, wherein this elastomer coating is selected from elastomerics, rubber and thermoplastic elastomer, and their multipolymer and blend.

5. according to the utensil of claim 1 or 2, wherein the thickness of this elastomer coating is that 1-is less than 200 microns.

6. according to the utensil of claim 1 or 2, it further comprises a defining plate that scribbles at least a elastomer coatings.

7. according to the utensil of claim 1 or 2, it further comprises one and scribbles base plate at least a elastomer coatings, top installation mold.

8. according to the utensil of claim 1 or 2, wherein the Young's modulus of this elastomer coating is 0.1-50MPa.

9. a method that forms elastomer coating on detergent bar punching press utensil comprises

I) adopt chemistry and/or mechanical means that this utensil is carried out pre-treatment, to be formed for the mating surface of described elastomer coating; And

Ii) apply described elastomer coatings, its thickness is less than 200 microns.

10. according to the method for claim 9, wherein mechanical means are to be selected from the surface-conditioning means of handling with wire brush, sand paper, spraying technique, spark erosion, polishing and combination thereof.

11. according to the method for claim 9, wherein chemical means is selected from solvent cleaning, acid treatment, surface corrosion, applies priming paint, applies stickiness bonding chemical and combination thereof.

12. an employing comes the method for stamping detergent bar according to the utensil of claim 1 or claim 2.

13. the method according to the stamping detergent bar of claim 12 comprises

I) at least one surface of mould, form elastomer coating less than 200 micron thickness;

In the mould of the step I of ii) detergent bar composition being packed into;

Be the punching press soap bar iii) with the composition drawing in the mould; And

The mode and the mould separating that iv) make this be easy to duplicate according to the surface decoration that extrudes on it.

14. according to the method for claim 12, wherein said surface decoration is corporate logo, trade mark or similar picture and text.

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