CN107881043A

CN107881043A - Piece for washing

Info

Publication number: CN107881043A
Application number: CN201711087875.XA
Authority: CN
Inventors: 沈愚先; 金胜镇; 宋俊烨; 金致会; 张硕胤
Original assignee: LG Household and Health Care Ltd
Current assignee: LG H&H Co Ltd
Priority date: 2011-05-13
Filing date: 2012-04-17
Publication date: 2018-04-06
Anticipated expiration: 2032-04-17
Also published as: WO2012157851A2; WO2012157851A3; CN106978264B; WO2012157851A9; CN108085146B; CN108085146A; CN103608448B; CN108559679A; CN103608448A; CN107881043B; CN106978264A; CN107881043B9; CN107828567B; CN113004991A; CN107828567A; CN108559679B

Abstract

The present invention is provided to the piece of washing, and it can be dissolved completely in water and after wash without removing.In addition, the piece for being used to wash with good clean-up performance, using it is simple, there is the storage stability of determination and will not be brought inconvenience in use to user.The piece for being used to wash of the present invention is prepared by using polyvinyl alcohol polymer/copolymer, specific principal surfactant and optional cosurfactant (preferred nonionic surfactants, more preferably LA7/LA9).

Description

Piece for washing

The application is the divisional application of the Chinese patent application of Application No. 201280029267.2, and original application is 2012 PCT International Application Serial No. PCTs/the KR2012/002916 submitted April 17 enters the Shen of National Phase in China on December 13rd, 2013 Please.

Technical field

Present disclosure is related to the detergent for being placed in washing machine and using wherein.More particularly, present disclosure It is related to piece type or membranous type detergent, its formula is different from general powder or liquid detergent.

This application claims the korean patent application No.10-2011- submitted on May 13rd, 2011 in Republic of Korea 0045255th, the korean patent application No.10-2011-0045256 that is submitted on May 13rd, 2011 in Republic of Korea, in 2011 The korean patent application No.10-2011-0045257 that is submitted in Republic of Korea on May 13, on December 9th, 2011 in great Han The korean patent application No.10-2011-0132080 of the Republic of China's submission, the South Korea submitted on December 9th, 2011 in Republic of Korea Patent application No.10-2011-0132083 priority, the disclosure of which are herein incorporated by reference.

Background technology

So far always using powder detergent or liquid detergent as being placed in washing machine and what is used wherein washes Wash agent.However, they the shortcomings that are, liquid detergent is relatively heavy, and powder detergent is easy to spread.Therefore, to new The demand of detergent constantly increases.

In order to solve these problems, United States Patent (USP) No.4,605,509 disclose liquid-type detergent component and fabric is soft Agent is encapsulated in the technology in water-solubility membrane sealer.They are encapsulated respectively using water-soluble polymer films however, working as When, during storage or in transport, sealer may rupture and product leakage content.In addition, table of the active component from film Face is oozed out, and causes the storage stability of product to substantially reduce.In addition, although devise the water-solubility membrane as potting thing with Ensure the stability and persistence of content resistance moisture in air, but need the considerable time to dissolve this at low temperature Water-solubility membrane, and the water-solubility membrane is not completely dissolved even, causes the residual of film residue.

In addition, although developed by water-insoluble suction sheet adsorptive liquid detergent come use be used for wash The piece washed, it is to have to remove the water-insoluble suction sheet after washing the shortcomings that this still.

The content of the invention

Technical problem

Therefore, present disclosure is related to the laundry sheet for providing and being used for being used in washing machine, and it is complete in washing process Dissolving, there is excellent clean-up performance, be easily fabricated and ensure storage stability.

Technical solution

In order to realize the purpose of present disclosure, there is provided form polymer by using piece, the surface for washing is lived Property the manufacture such as agent the piece for being used to wash,

Wherein i) piece forms polymer is polyvinyl alcohol or the copolymer based on polyvinyl alcohol, and

Ii) surfactant for cleaning action is that the non-aromatic surface without ethylene oxide group is lived in the structure Property agent, it is therefore preferable to there is the alkyl sulfate of 8 to 18 carbon atoms, more preferably lauryl sulfate.

The salt of alkyl sulfate including lauryl sulfate is metal alkyl salt, preferably sodium salt or sylvite, most preferably For sodium salt.

Present disclosure is based on following unexpected surprising discovery：When using polyvinyl alcohol or being total to based on polyvinyl alcohol Polymers as wash piece base material when, astoundingly, numerous surfactants (nonionic surfactant, from Sub- surfactant, amphoteric surfactant etc.) among, in the purpose of present disclosure, film forming, clean-up performance, stability Etc., the surfactant of specific structure is preferable, and among them, especially, in fact it is highly preferred that there are 8 to 18 The alkali metal alkyl sulfates of carbon atom, more preferably lauryl sulfate alkali metal salt (most preferably NaLS).

Following characteristics are had according to the piece for being used to wash of present disclosure：(1) it is easy to dissolve in water at low temperature, so as to Excellent clean-up performance is provided, (2) prevent liquid-type active component from being oozed out from piece, and until being put into washing machine, (3) have foot With the tensile strength for preventing it from rupturing when in use, and flexibility is shown, the absorption of (4) due to resisting ambient moisture, therefore With distributional stability, and (5) show excellent clean-up performance.

In the piece for being used to wash according to present disclosure, in multiple polymers it is highly preferred using polyvinyl alcohol or Based on the copolymer of polyvinyl alcohol as the base material for forming the piece for washing, the multiple polymers are for example, gelatin, fruit Glue, glucan, hyaluronic acid, ossein, agar, acacia gum, Acacia rubber, alginic acid, sodium alginate, Methyl cellulose Element, ethyl cellulose, hydroxyethyl cellulose, sodium carboxymethylcellulose, starch, dextrin, CMS, polyvinylpyrrolidine Ketone, polyethylene methacrylate, polyacrylic acid, PEO etc..

That is, the copolymer different from other film-forming components, polyvinyl alcohol or based on polyvinyl alcohol can maintain material property, Such as tensile strength of film etc., embedded in the matrix formed by polyvinyl alcohol or the copolymer based on polyvinyl alcohol big The active component (for example, surfactant) of amount is also such.The present inventors have additionally discovered that polyvinyl alcohol or being total to based on polyvinyl alcohol Polymers shows excellent clean-up performance, or even with standard-sized aqueous tissue also in this way, because the poly- second of per unit area Enol or based on the copolymer of polyvinyl alcohol required for detergent flakes material property limitation within can accommodate it is a large amount of Surfactant.

In the piece for being used to wash of present disclosure, especially, polyvinyl alcohol or the copolymer tool based on polyvinyl alcohol Have various molecular weights and saponification degree, when consider film forming, dissolubility, easily fabricated property, storage stability, clean-up performance, It is more excellent preferably using the copolymer that number-average molecular weight is 10,000 to 100,000 during program efficiency (viscosity of mixed solution) etc. Choosing using number-average molecular weight be 20,000 to 50,000 copolymer, even more preferably using number-average molecular weight be 20,000 to 30,000 copolymer.

In addition, the preferred saponification degree of polyvinyl alcohol or the copolymer based on polyvinyl alcohol according to the purpose of present disclosure, Whether it is copolymer based on polymer, whether uses alkaline auxiliary lotion etc. and changes.More specifically, when polymer is polyvinyl alcohol And when alkaline auxiliary lotion is not used, preferable saponification degree is 80% to 90%.In addition, when polymer is preferably to include according to this When the formula 1 below of disclosure or the specific copolymer of 2 comonomer and use alkaline auxiliary lotion, saponification degree is preferred For 60% to 90%, more preferably 70% to 85%, even more preferably 70% to 82%.

Present disclosure also provides the piece for being used to wash comprising polymer, surfactant and alkaline auxiliary lotion,

Wherein, i) polymer be comprising with carboxyl anionic monomer unit the copolymer based on polyvinyl alcohol, with And

Ii) surfactant is the non-aromatic surfactant for being free of ethylene oxide group in the structure, is preferably had There are the alkyl sulfate of 8 to 18 carbon atoms, more preferably lauryl sulfate.

As copolymer, being total to for formula 1 below or 2 vinyl alcohol monomer units and anionic monomer unit is preferably comprised Polymers, the copolymer being more preferably made up of formula 1 below or 2 vinyl alcohol monomer units and anionic monomer unit.At this In the case of kind, 0.5mol% to 5mol% anionic monomer units copolymer is particularly preferably included.

The ＞ of ＜ chemical formulas 1

The ＞ of ＜ chemical formulas 2

In chemical formula 1 and 2, R₁、R₂And R₃Each independently be H or methyl, and n independently 0 to 3 it is whole Number.

When using polyvinyl alcohol (PVA) as main preparaton, problem is that it may be by as cleaning action component One of alkaline auxiliary lotion solidification., can be simultaneously when using the copolymer based on polyvinyl alcohol to replace PVA to be used as into film base material Improve the cleaning efficiency of film forming, the dissolubility of film and piece for washing, or even in the presence of alkaline auxiliary lotion also such as This.However, astoundingly, all anionic monomers are all not suitable as the monomer of the copolymer, and only including has carboxylic The copolymer of the anionic monomer of base is suitable to the purpose of present disclosure.For example, comprising with-SO₃H anionic monomer PVA copolymers are easy to by alkaline auxiliary lotion gelation, as a result, described is difficult to dissolve after being manufactured.

In addition, quite especially, it is used to wash comprising metal alkyl sulfate, alkaline auxiliary lotion and PVA copolymers In the piece washed, the saponification degree of PVA copolymers is preferably 60% to 90%, and more preferably 70% to 85%, even more preferably 70% to 82%.Specifically, when saponification degree is too high (for example, more than 90%), the piece after manufacturing occurs dissolubility significantly The phenomenon of reduction, and when saponification degree too low (for example, less than 60%), the water-soluble reduction of copolymer.It is worth noting that, this Individual result is different from the result of PVA previously discussed preferred saponification degree.

Present disclosure is based on following unexpected surprising discovery：Using polyvinyl alcohol or being total to based on polyvinyl alcohol In the case of base material of the polymers as the piece for washing, quite especially, in various surfactant (non-ionic surface actives Agent, ionic surface active agent, amphoteric surfactant etc.) among, according to the purpose of present disclosure, in film forming, spatter property Energy, stability etc. highly preferable use the non-aromatic surfactant conduct for being free of ethylene oxide group in the structure Principal surfactant.In the structure in the non-aromatic surfactant without ethylene oxide group, especially, more preferably have There are the alkali metal alkyl sulfates of 8 to 18 carbon atoms, even more preferably lauryl sulfate alkali metal salt, most preferably lauryl sulphur Sour sodium.

Preferably, by the gross weight meter of surfactant, the content of principal surfactant is 50 weight % or more, more Preferably 60 weight % or more, even more preferably 70 weight % or more.

The surfactant of a large amount of ethylene oxide groups is included in the structure (for example, sodium laureth sulfate when using (SLES) or with the addition of EO nonionic surfactant) as main surfactant when, filming performance can substantially reduce. The structural behaviour of the attraction hydrone of oxirane is considered as that dissolubility of the polyvinyl alcohol in water reduces and for washing Piece material property deterioration the reason for；However, present disclosure is not restricted to the theory hypothesis.

In addition, in the feelings using the surfactant (for example, linear alkyl benzene sulfonate (LAS)) with aromatic group Under condition, when manufacturing described together with polyvinyl alcohol with the surfactant, filming performance, storage stability etc. drop significantly It is low.When using the surfactant with aromatic group as principal surfactant, and as the poly- second into film base material The poor compatibility of enol or polyvinyl alcohol copolymer, and cannot ensure good film properties.

Therefore, it is highly preferred that including the piece for being used to wash of polyvinyl alcohol polymer/copolymer and surfactant In, present disclosure includes being free of the non-aromatic surfactant of ethylene oxide group in the structure as surfactant. In addition, it is highly preferred that the non-aromatic surfactant without ethylene oxide group is to be considered as always containing by surfactant Gauge, preferably comprise from 50 weight % or more, more preferably 60 weight % or more, even more preferably 70 weight % or more master Want surfactant.

The non-aromatic surfactant without ethylene oxide group as principal surfactant can be alkyl sulfide Hydrochlorate RSO₄ ^-M⁺(M is alkali metal, preferably sodium or potassium, more preferably sodium), alpha-alkene sulfonate, alkanesulfonic acid alkali metal salt (being preferably sylvite), aliphatic sulfonic methyl esters alkali metal salt (aliphatic ethyl ester sulfonate alkali Metal salt) (be preferably sylvite), aliphatic acid, alkylglycoside etc., in this case, according to multiple mesh of present disclosure , particularly preferred alkyl sulfate, especially astoundingly, according to multiple purposes (including film forming etc.) of present disclosure, More preferably NaLS.Included in the alkyl in the structure of the non-aromatic surfactant without ethylene oxide group Or the carbon number of alkane is preferably C8 to C18, the carbon number of aliphatic acid is preferably C8 to C18.

Although not limited to theory, it is recommended that particularly preferably comprising C8 to C22, (preferably C8 to C18, more preferably C12 are extremely C16 the alkyl sulfate surfactant of saturated hydrocarbons), because it can be improved while making tablet preparation have good strength Clean-up performance, this is due to itself and the superior compatibility as polyvinyl alcohol polymer/copolymer into film base material, even if surface The content height of activating agent is also such；However, present disclosure is not limited to the theory hypothesis.

If used using polyvinyl alcohol polymer/copolymer according to present disclosure and the manufacture of specific surfactant In the piece of washing, then the total content of all surface activating agent be preferably based on dry after piece gross weight 30 weight % to 80 Weight % (more preferably 40 weight % to 70 weight %), the content of polyvinyl alcohol polymer/copolymer is preferably based on dry after Piece gross weight 20 weight % to 50 weight % (more preferably 30 weight % to 50 weight %, even more preferably 35 weight % To 50 weight %).

As shown in following experimental results, when the content of polyvinyl alcohol polymer/copolymer is less than 35 weight %, described Material character (that is, intensity) well, but be based on condition of storage, surface active agent composition is possible to smear (smear) out, And when the content of polyvinyl alcohol polymer/copolymer is less than 30 weight %, on the intensity of described is significantly reduced while had State problem so that can occur to use defect.

When the content of surfactant is less than above range, clean-up performance reduces, and when the content exceedes above range When, the content relative reduction of polyvinyl alcohol polymer/copolymer, therefore, tablet preparation is difficult to manufacture.

In addition to polyvinyl alcohol polymer/copolymer and surfactant, the piece for washing can also include hereafter The additive, for example, fluorescent dye, enzyme etc..

Preferably, present disclosure provides is used to wash comprising polyvinyl alcohol polymer/copolymer and surfactant Piece, wherein the surfactant includes：

(a) principal surfactant, it is not conform to the non-aromatic surfactant of ethylene oxide group in the structure (more Preferably by chemical formula RSO₄ ^-M⁺What (M is alkali metal, preferably sodium or potassium, most preferably sodium) represented has 8 to 18 The alkyl sulfate of carbon atom, even more preferably sodium alkyl sulfate, most preferably NaLS), and

(b) cosurfactant is epoxide ethylization in heptan laruyl alcohol (LA7), nonyl epoxide ethylization alcohol (LA9) or it is mixed Compound.

Present disclosure is also based on following surprising discovery：Using polyvinyl alcohol or copolymer based on polyvinyl alcohol and In the piece for being used to wash that surfactant as cleaning action component manufactures, Oxyranyle is free of in the structure when using Non-aromatic surfactant (alkyl sulfate more preferably with 8 to 18 carbon atoms, even more preferably alkylsurfuric acid of group Sodium, most preferably NaLS) it is used as principal surfactant and uses nonionic surfactant LA7 or LA9 (preferably When LA7) being used as cosurfactant, clean-up performance can be greatly improved while maintain film forming.When other have it is excellent clear When the surfactant of clean performance mixes with polyvinyl alcohol polymer/copolymer and lauryl sulfate salt system, astoundingly, LA7 or LA9 only reduce film forming showed to low degree or in terms of clean-up performance is improved it is excellent.

Therefore, it is highly preferred that present disclosure provides the lauryl sulphur for using and only including and (a) as principal surfactant The piece for being used to wash of hydrochlorate (most preferably sodium salt) and (b) LA7 and/or LA9 (preferably LA7) surfactant manufacture.

Moreover it is preferred that present disclosure provides the piece for washing, it is characterised in that the mixing ratio between (a) and (b) Rate (a: b) is 90: 10 to 60: 40, more preferably 80: 20 to 70: 30.

As too many LA7 or LA9 as cosurfactant of mixing, it penetrates through described, and deteriorates piece Property, this can make it be difficult to operate, and as mixing LA7 or LA9 as cosurfactant very little, clean-up performance Improve not notable.

Therefore, present disclosure, which provides, use polyvinyl alcohol or copolymer based on polyvinyl alcohol, as major surfaces work Property agent alkyl sulfate and the piece for being used to wash that is manufactured as LA7, LA9 of cosurfactant or its mixture, The alkyl sulfate is by RSO₄ ^-M⁺(M is alkali metal, preferably sodium or potassium, most preferably sodium) (it is preferably sodium alkyl sulfate, More preferably NaLS) what is represented has the alkyl of 8 to 18 carbon atoms, wherein the gross weight meter of piece after drying is pressed, The content of polyvinyl alcohol or copolymer based on polyvinyl alcohol is 30 weight % to 50 weight %, as principal surfactant The content of sodium alkyl sulfate is 30 weight to 60 weight %, and the content of cosurfactant is 10 weight % to 20 weight %.

In the preparation according to present disclosure, present disclosure also based on following it is surprisingly found that：It is it is preferred that basic On without using starch as preparaton (into film base material).When mixing starch and when being used as preparaton (that is, comprising starch as structure Into one of described component), the solution suction phenomenon (poor compatibility) of generation surfactant, and as starch contains after the drying Amount increase, the intensity of piece decrease.In addition, as content of starch increases, dissolubility also decreases.

In this disclosure, " substantially without using " expression " the dry weight meter of press piece, comprising 5 weight % or less, preferably 3 weight % or less, more preferably 1 weight % or less, even more preferably zero ".

Film forming, storage can not also deteriorated surely comprising following material according to the piece for being used to wash of present disclosure Clean-up performance or filming performance are improved in the range of qualitative, easily fabricated property etc.：Fluorescent brightening enzyme is (for example, cellulase, albumen Enzyme etc.), alkaline auxiliary lotion is (for example, sodium hydroxide, sodium carbonate, sodium acid carbonate, sodium metasilicate, alkaline sodium silicate, neutral silicic acid Sodium, sodium tripolyphosphate, sodium pyrophosphate, Boratex, zeolite (sodium aluminosilicate), sesquicarbonate, MEA, TEA), disintegrant/disintegration Auxiliary agent (for example, starch, cellulose derivative, sodium chloride, citric acid, glycerine, propane diols), fabric softener are (for example, quaternary ammonium chlorine Cationic surfactant, the silicone fabric softening component of compound group), bleaching agent (for example, perborate, percarbonate, Superphosphate (superphosphate), two acyls, four acyl peroxide)；Dispersant/emulsifying agent is (for example, polyoxyalkylene Alkyl phenyl ether, polyoxyalkylene alkyl ether, polyoxyethylene polyoxypropylene block polymer), bactericide/disinfectant (for example, Sodium hypochlorite, hydrogen peroxide, urea peroxide)；Spices, preservative, dyestuff, antiseptic etc..

Thickness according to the piece for being used to wash of present disclosure be preferably 1 μm to 1cm, more preferably 5 μm to 0.5cm, Most preferably 50 μm to 1mm.When the thickness through the dry piece for being used to wash is less than 1 μm, the supporting to active component is not filled Point, film strength is low, it is difficult to desired performance is obtained, and when the thickness through the dry piece for being used to wash is more than 1cm, dissolving It is slack-off, and clean-up performance deterioration becomes to cause concern.

It is highly preferred that by the gross weight meter of piece after drying, present disclosure provides (excellent to 50 weight % comprising 20 weight % Select 30 weight % to 50 weight %) PVA, 30 weight % to 50 weight % SLS, 10 weight % to 20 weight % LA7/9, The piece type of optionally 1 weight % to 5 weight % fluorescent whitening agent and optionally 1 weight % to 5 weight % enzyme is water-soluble Laundry detergent compositions.When the piece type laundry detergent compositions of present disclosure be put into together with clothing washing machine and wherein in use, its It is completely dissolved, the process without removal.

Except polyvinyl alcohol or the copolymer based on polyvinyl alcohol, principal surfactant and cosurfactant it Outside, can also be included to cause the close limit amount without prejudice to present disclosure purpose according to the piece for being used to wash of present disclosure Another cosurfactant.The surfactant for containing ethylene oxide group in the structure can also be included as another Kind cosurfactant, and laureth sodium sulphate can be used as the table containing ethylene oxide group in the structure Face activating agent.

In addition to polyvinyl alcohol or copolymer and principal surfactant based on polyvinyl alcohol, according to present disclosure Be used for wash piece can also include with cause without prejudice to the scope of present disclosure purpose aromatic surfactants work For cosurfactant, and alkylbenzenesulfonate can be used as the aromatic surfactants, and preferably, The alkyl of the alkyl benzene sulphonate is the linear alkyl with 8 to 18 carbon atoms.

The piece for being used to wash of present disclosure can be at least to divide two layers of state to use, wherein a synusia is according to this public affairs Content is opened, another synusia is stacked thereon and integrated.

The piece for being used to wash according to present disclosure can be manufactured by following steps：Dissolved in the water of appropriate amount Polyvinyl alcohol or based on the copolymer of polyvinyl alcohol to prepare polyvinyl alcohol polymer/copolymer solution, by the solution with comprising The other components mixing of surfactant etc., gains is molded as the piece of uniform thickness, and is dried.In addition, according to the disclosure The piece for being used to wash of content is not limited to previous building methods, for example, manufacture method can be included in polyethylene dissolving alcohol in water Or before the copolymer based on polyvinyl alcohol, dissolve other components (for example, surfactant).

Present disclosure also based on the fact that：It is preferred that also include bubbling process in a manufacturing method to improve in the disclosure Dissolubility of the piece of appearance in water, when proportion is adjusted into 0.6 to 0.9 by bubbling process, it can preferably provide and be used for Many advantages of the piece of washing in water-soluble, water-soluble speed etc..Therefore, present disclosure provides the system comprised the following steps The method for making the piece for washing：Prepare molten comprising polyvinyl alcohol or copolymer based on polyvinyl alcohol and surfactant Liquid, foaming, and dry.That is, present disclosure provides the piece for being used to wash comprising the multiple holes formed by bubbling process.

Therefore, present disclosure also provides is used for above-mentioned technical characteristic and proportion for 0.6 to 0.9 additional features The piece of washing.

Favourable effect

Present disclosure provides the piece for washing, and it is completely dissolved and therefore without removing after wash, had Excellent clean-up performance is simple and easy to use, it is ensured that storage stability, and will not be related to or cause not in use Just.

Brief description of the drawings

Fig. 1 is that piece of the explanation based on polyvinyl alcohol (PVA) molecular weight, PVA contents and the water content based on solid stretches The figure for the experimental result that intensity changes.For example, in the value " 03-40-170 " of X-axis, first value represents the degree of polymerization/100 (i.e., 03 represents the degree of polymerization as 300), second value represents PVA contents (weight %), and the 3rd value represents the water content based on solid (weight %).PVA molecular weight is about 50 times of the degree of polymerization.The value of Y-axis represents tensile strength, its unit be kilogram/centimetre² (kgf/cm²)。

Fig. 2 is to illustrate the change by using tensile strength caused by PVA of the starch substitution as a preparaton part As a result figure.In the figure, the value of Y-axis represents tensile strength, and its unit is kgf/cm².In fig. 2, red boundary line shows It is 5kgf/cm to go out required minimum tensile strength when using piece²(if less than the minimum tensile strength, then piece is easily torn Or rupture).

Fig. 3 is to illustrate the figure that viscosity changes under conditions of concrete content with the increase of PVA molecular weight.In this feelings Under condition, for every kind of mixed solution, water content is 240% based on solid.

Embodiment

Hereinafter, the embodiment of present disclosure is will be described in help to understand present disclosure.However, it is possible to A variety of changes and change are made to the embodiment of present disclosure, and it will be understood that scope of the present disclosure be not limited to Following embodiments.The embodiment of present disclosure is to provide more completely retouching for present disclosure for those skilled in the art State.

The ＞ of ＜ embodiments 1 is used for the selection of the suitable polymer of the piece washed

Manufacture the piece for washing using the different polymer according to table 1, the film forming of polymer, dissolubility and Evaluated in terms of storage stability.As a result show in table 1 below.

Prepared by the dissolving in the distilled water or ethanol (about 400g) of appropriate amount or the corresponding polymer of suspension 100g Polymer solution or suspension.Polymer solution or suspension are applied with predetermined thickness by using Elcometer films applicator In release film (release film), 10 minutes are dried in 115 DEG C of drying oven to manufacture the piece (thickness for washing： 0.01cm).Using (excellent, good and poor) evaluates film forming in three levels with the piece after manufacture in the fabrication process Property.

Following evaluation dissolubility.Manufactured diaphragm is cut into 5cm × 5cm, is then put into about 300ml15 DEG C of pure water In 500ml beakers, at the uniform velocity stir.The time spent in film is decomposed and dissolved completely length is measured, is evaluated in three levels Dissolubility：Excellent (be equal to or less than 3 minutes), good (3 minutes to 5 minutes) and poor (more than 10 minutes).

Table 1

In table 1, ATC represents [2- (acryloyl group epoxide) ethyl] trimethyl ammonium chloride；DMAEMA represents metering system Sour dimethylamino ethyl ester；HEA represents Hydroxyethyl Acrylate, and HEC represents hydroxyethyl cellulose；And HPMC represents hydroxypropyl Methylcellulose.

As shown in table 1, it is steady for the film forming and obtained sheet dissolubility of the piece of washing, easily fabricated property, storage in manufacture Qualitative aspect, most preferably polyvinyl alcohol are as the polymer for manufacturing the piece for washing.

Evaluations of the ＞ of ＜ embodiments 2 to PVA content and the effect of molecular weight

In addition, as polyvinyl alcohol evaluation film forming, the dissolubility used with various molecular weights and saponification degree, it is easy to make The property made, storage stability, the result of clean-up performance and program efficiency (viscosity of mixed solution), according to present disclosure mesh , when considering the relation with content used, the polyvinyl alcohol or polyethylene of preferred number average molecular weight 10,000 to 100,000 Alcohol copolymer, more preferably molecular weight are 20,000 to 50,000 polymer, and even more preferably molecular weight is 20,000 to 30, 000 PVA or its copolymer.In addition, on saponification degree, when unmixed alkaline auxiliary lotion, preferably saponification degree be 80% to 90% polymer, and when using PVA copolymers and mixed-alkali builder when, be particularly preferred saponification degree for 60% to The polymer of 90% (more preferably 70% to 85%, even more preferably 70% to 82%).When use saponification degree is than above-mentioned saponification During the polymer of the lower scope of degree, water solubility reduces, and works as and use saponification degree in the poly- of the scope higher than above-mentioned saponification degree During compound, gel phenomenon occurs.

The experimental result of confirmation above disclosure is shown in table 3 below and 4.The manufacture of described and evaluation with implementation The similar mode of example 1 is carried out.In this case, casting condition is 1100 μm (coating thickness of mixed solution), and is dried Condition is 115 DEG C and 15 minutes.Membrane material characteristic (" dried surface ") including shift index etc. is scored and commented Valency.For example, 1 point represents except there is situation no abnormal on the external film of residual on surface, and 3 points represent on the surface of the film Still there is the situation of residual there occurs phenomenon of phase separation, and on surface.The evaluation criterion of dissolubility and tensile strength such as table 2 below Shown in.

Table 2

Polymer content there occurs change in the case of, by supplement or reduce surfactant (SLS, LA7) come Total solid (PVA, SLS, LA7 and other) content is adjusted to 100%, other components (fluorescent whitening agent, enzyme, spices etc.) Content is fixed as 5 weight %.Use 40 weight % PVA, 45 weight % SLS, 10 weight % LA7 and 5 weight % Other components are as basic recipe (formula No.1).In table 3, PVA content represents that PVA accounts for total solid in addition to water Weight %, water content expression water when preparing mixed solution account for the weight % of total weight of solids.That is, in No.1 is formulated, 40% PVA contents represent to include 40 weight % PVA in total solid because 63% water content means for manufacturing piece 37% solid and 63% water is included in mixed solution, it is assumed that solids content is 100, then water content is about 170.

Table 3

Table 4

* in No.13 is formulated, drying time increases by two minutes.

As Table 3 and Table 4, PVA number-average molecular weight less than or equal to about 15,000 in the case of, described Low intensity, the solution suction phenomenon (poor compatibility) of surfactant occurs after drying.In order to solve the problem, increase in piece PVA content is to improve the formability of piece and intensity, but due to reducing the content of active component, so clean-up performance Reduce.

Meanwhile as the increase of molecular weight, the surface stabilization (compatibility improvement) of piece and the intensity of piece improve.Cause This, molecular weight is higher, more it is advantageously ensured that ensureing the formability of piece under low PVA contents；However, sticking due to mixed solution Du Taigao, so being substantially difficult to ensure that the program efficiency for being suitable for largely producing.Meanwhile the content of water can be increased to change Enter this problem (that is, reducing viscosity), but this can be related to significantly reducing for yield.

Therefore, as a result, compatibility in view of piece intensity and with cleaning action component, PVA's or its copolymer used Number-average molecular weight is preferably 20,000 or higher.In addition, with predetermined PVA contents (about 30%) and predetermined water content (base In the weight % of solid 240) in the case of, it is contemplated that manufacturing process, 5,000cps or lower be it is appropriate, therefore, PVA or it is common The number-average molecular weight of polymers is preferably 5,000 or smaller, more preferably 30, and 000 or smaller.

It is related to this, when its of use 30 weight % PVA, 52 weight % SLS, 13 weight % LA7 and 5 weight % His component, and based on the solid piece of 100 parts by weight, during using the water of 240 parts by weight to manufacture piece, measure point with PVA The viscosity for the polymer solution that son amount increases and changed, its result are shown in table 3.Polymer used is molten in the fabrication process The viscosity of liquid is too high or too low to be all not preferred, find comprising the polymer solution of component described in present disclosure viscosity from About 50,000 molecular weight starts to improve rapidly.

As reference, the piece tensile strength based on molecular weight, PVA contents and water content based on solid is shown in Fig. 1 The measurement result of change.According to the purposes of piece, it is necessary to 5kgf/cm²It is or bigger (when tensile strength is 5kgf/cm²Or more hour, it Easily tear or rupture) minimum, by 10kgf/cm²Or it is defined as good level more greatly, according to tensile strength, such as preferably 05-40-170 formulas, 10-40-170 formulas, 15-30-200 formulas, 10-40-200 formulas, 15-40-240 formulas, 10-30- 200 formulas and 10-35-200 formulas.

The evaluation of the selection of the ＞ principal surfactants of ＜ embodiments 3

Component and content according to being listed in table 5 manufacture the piece for washing, film forming and cleaning to manufactured piece Performance is compared evaluation

Table 5

Numbering	Component	Content (unit：%)
			1	Polyvinyl alcohol (PVA)	40%
2	The surfactant of table 3	55%
			3	Fluorescent whitening agent	2%
4	Enzyme	1.5%
			5	Spices and other	1.5%

Specifically, PVA solution is prepared by following：145g PVA (saponification degrees are put into 630g distilled water： 86.5%, average degree of polymerization：500), dissolved 2 hours at 80 DEG C.It is molten that the other components of table 5 are added to prepared PVA Liquid, mixed with mechanical agitator.Mixed solution is put on by release with predetermined thickness by using Elcometer films applicator Film, 10 minutes PVA films for including the surfactant as cleaning component to manufacture are dried in 115 DEG C of drying oven.

The evaluation result of film forming and clean-up performance based on surfactant types is shown in table 6.With with the phase of embodiment 1 Same method is based on (excellent, good and poor) the evaluation film forming of three levels.Clean-up performance is evaluated by method identified below, The 60% or higher cleaning capacity based on the fabric (Japan) made dirty is defined as it is excellent, 50% to 59% be it is good, 50% It is or lower to be poor.

Specifically, cleaning capacity is evaluated using the washing machine of the same terms, in this case, is carried out using running water Rinsing.In addition, wash temperature is the condition identical cold water with using at home, using the wet fabric artificially made dirty (by day This laundry scientific institution manufacture) and fabric (EMPA 116) through protein contamination as being used for making dirty for detergency evaluation Fabric.Furthermore, it is possible to evaluated under conditions of the fabric made dirty belongs to cotton T-shirt.In addition, the use of 16 sizes is 5cm × 5cm the fabric made dirty is compared evaluation by statistical method.In this case, using colour difference meter before washing The WB values of the whitness index of the fabric made dirty are represented with measurement after washing.It is used to wash by what is manufactured in the embodiment above Piece be cut into 20cm × 15cm size, the detergent for using two panels to cut., will be in embodiment when starting to wash clothing The piece for being used to wash of manufacture is put into washing machine together with the fabric made dirty respectively, in the standardization program (washing 20 of washing machine Minute, rinsing twice) and medium water level under conditions of washed, after dewatering by the fabric made dirty with stably Temperature and humidity room (25 DEG C, 20%RH) in dry a week, ironing, use same colorimeter measurement WB values.Will Acquired results substitute into the Kubelka-Munk equatioies for being expressed as formula 2, to calculate cleaning capacity, are as a result shown in table 6.

Equation 1

In equation 1, Rs represents the surface reflectivity for the fabric made dirty, and Rc represents the fabric made dirty after the washing process Surface reflectivity, and Ro represent White cotton fabric surface reflectivity.

Table 6

As shown in table 6, very astoundingly, when using polyvinyl alcohol as polymeric substrate, only lauryl Sodium sulphate (SLS) is excellent in terms of film forming, and other be used for wash surfactants be in terms of film forming it is good or Difference.For example, surfactant LAS, SLES and MEA are subjected to being separated in the fabrication process, there is low and PVA compatibilities, institute The piece of manufacture has stickiness or frangible, therefore improper in terms of the storage stability and easily operated property of manufactured piece.

The evaluation of the selection of the ＞ cosurfactants of ＜ embodiments 4

As principal surfactant and a variety of nonionic surfactants are used as auxiliary using NaLS Cosurfactant manufactures a variety of pieces for being used to wash according to the formula of table 7, and these pieces are evaluated.By with implementation The similar method of example 3 manufactures the piece for washing.

Table 7

In table 7, PVA⁽¹⁾Represent the polyvinyl alcohol that saponification degree is 86.5% and average degree of polymerization is 500, SLS⁽²⁾It is right Fluorescent dye should be used as using Tinopal CBS-X (Ciba Specialty Chemical) in NaLS⁽³⁾。

By the piece for being used to wash with more than embodiment 1 or the test of the identical method of embodiment 3 manufacture, based on table 8 Standard evaluates these pieces, is as a result shown in table 9.

The tensile strength of film is evaluated as follows.Method of testing defers to the method for testing of ISO 527-3 standards, uses general survey Zwick 1120 is put in trial assembly.Each sample is manufactured with uniform thickness 0.2mm, and is cut into 2 × 10 (cm²), held with screw cramp The distance between firmly sample, clamp maintains 50mm, and extension test is carried out with the speed of 20mm/ minutes.It will can not be born in film Pulling force and it is damaged when the point of time be arranged to tensile strength, it is contemplated that it is easy to use, the value of table 8 is arranged to standard.

Table 8

Table 9

As shown in table 9, LA7 and LA9 comprehensively lives in terms of cleaning capacity and material character than other non-ionic surfaces Property agent is more preferable, and LA7 is more preferable than LA9 in terms of cleaning capacity.

The effect of the ＞ of ＜ embodiments 5 SLS as principal surfactant and the LA7 as cosurfactant content Fruit is evaluated.

The piece for washing is manufactured, is at the same time changed with together with the component and content of table 10 as principal surfactant SLS and LA7 as cosurfactant content.Manufacture method is same as Example 4.

Table 10

Thus the film forming of the piece for being used to wash manufactured and cleaning are evaluated by evaluation method same as Example 4 Performance, as a result shown in table 11.

Table 11

As shown in table 11, when considering film forming and during clean-up performance, the gross weight meter of press piece, preferable SLS contents are excellent 40 weight % are elected as to 50 weight %, and the LA7 contents preferably as nonionic surfactant are 5 weight % to 15 weights Measure %.

The ＞ overall merits of ＜ embodiments 6

Water-soluble piece is manufactured according to the formula of table 12 and content, and evaluated in many aspects.Manufacture method is with implementing Example 4 is identical.

Table 12

In table 12, the PVA that using saponification degree be 86.5% and average degree of polymerization is 500 uses polyoxy second as PVA Allylic alkylation ether LA7 represents alpha-alkene sulfonate, uses Tinopal CBS-X (Ciba as nonionic surfactant, AOS Specialty Chemical) it is used as fluorescent dye.

The evaluation of flakiness

Based on following standard, washed by macroscopic observation to evaluate the water-soluble piece manufactured in above-described embodiment and comparative example The formability of agent is washed, is as a result shown in table 13.

◎：Tablet preparation is flexible and excellent, no smear phenomenon.

○：Tablet preparation is flexible, but has liquid component slightly smear comes out.

△：The flexible deficiency of piece, and have slight smear phenomenon.

×：Tablet preparation is not formed, and there are a large amount of liquid component smear to come out.

Table 13

As shown in table 13, it is found that embodiment a, b, c, d, k and l flakiness are excellent, with non-ionic surface active The increase of agent and SLES content, film forming significantly reduce.

The evaluation of dissolubility and tensile strength

By method same as Example 4 come test in above-described embodiment and comparative example manufacture be used for wash Piece, and evaluate its dissolubility and tensile strength.As a result shown in table 14.

Table 14

In the case of comparative example a and c, tablet preparation is not formed, therefore can not measure dissolubility and tensile strength.

As shown in table 14, embodiment a, b, c, d, k and l is especially excellent in dissolubility and the aspect of tensile strength two.

The evaluation of cleaning capacity

The cleaning capacity of the piece for being used to wash manufactured in above-described embodiment and comparative example is evaluated, described can pass through Following methods manufacture (coming evaluation comparison example a and c instead of water soluble detergent piece using same amount of active component mixed solution).

Specifically, cleaning capacity is evaluated using the washing machine of the same terms, in this case, is carried out using running water Rinsing.In addition, wash temperature is the condition identical cold water with using at home, the wet fabric (Japan artificially made dirty is used The manufacture of laundry scientific institution) and fabric (EMPA 116) through protein contamination as being used to evaluate making dirty for detergency evaluation Fabric.In addition, evaluated under conditions of the fabric made dirty belongs to cotton T-shirt.In addition, using 16 sizes be 5cm × The 5cm fabric made dirty is compared evaluation by statistical method.In this case, using colour difference meter before washing and Measurement represents the WB values of the whitness index of the fabric made dirty after washing.It is used for what is washed by what is manufactured in the embodiment above Piece cuts into 20cm × 15cm size, the detergent cut using two panels.When starting to wash clothing, by for washing Piece and detergent are put into washing machine together with the fabric made dirty, in standardization program (washing 20 minutes, the rinsing two of washing machine It is secondary) and medium water level under conditions of washed, and after dewatering, in the room (25 with stable temperature and humidity DEG C, 20%RH) in dry a week, ironing, then using same colorimeter measurement W_BValue.Acquired results are substituted into and implemented The identical Kubelka-Munk equatioies of example 3, to calculate cleaning capacity, as a result show in table 15.

Table 15

As shown in table 15, embodiment a, b, c, d, k with appropriate flakiness, dissolubility and tensile strength with And in l, the polyoxyethylene alkyl ether comprising 15 weight % shows best clear as the embodiment d of nonionic surfactant Clean performance.

The evaluation (hygroscopicity) of the ＞ stability of ＜ embodiments 7

The stability of the piece for being used to wash manufactured in the embodiment d of embodiment 6 is evaluated, is as a result shown in table 16.

Table 16

The initial dried residue of piece is 95 weight %, and water content is 5 weight %, is made after being dried 10 minutes at 105 DEG C With the residue that the measurement of Halogen moisture analysers is dry.

As shown in table 16, although product is water-soluble piece detergent, (it is included in high temperature and height under numerous conditions Under the conditions of the rainy season of humidity) it ensure that stability as product.

The evaluation used of the ＞ PVA copolymers of ＜ embodiments 8

It is same as Example 4 according to piece of the formula manufacture of table 17 for washing, manufacture method.

Table 17

In table 17, PVA⁽¹⁾The polyvinyl alcohol that saponification degree is 86.5% and average degree of polymerization is 500 is represented, uses second Enol (98mol%, saponification degree：About 77mol%)-methacrylic acid (2m0l%) copolymer is as PVA copolymers⁽²⁾, SLS⁽³⁾ Corresponding to NaLS, builder is used as using sodium carbonate (soda)⁽⁴⁾, use Tinopal CBS-X (Ciba Specialty Chemical) it is used as fluorescent dye⁽⁵⁾。

By the manufactured piece for being used to wash of method evaluation same as Example 4, as a result shown in table 18.

Table 18

As shown in Table 18, when adding builder to PVA, PVA solidifications so that dissolubility and material property are significantly bad Change, due to this insoluble component, clean-up performance is also without the effect for producing builder.However, when using PVA copolymers, Even if with the addition of builder also without solidifying, and clean-up performance is improved due to builder, be more than when viscosity or During equal to predetermined level, effect clean-up performance caused by relatively reduced because of the amount of surfactant reduce and Offset.In addition, when the amount of builder is more than or equal to 7.5%, the intensity of piece is reduced due to a large amount of builders in film.

The evaluation of the effect of the ＞ of ＜ embodiments 9 addition starch

Piece is manufactured according to the formula of table 19, addition starch is evaluated using PVA, starch or its mixture as preparaton Effect.Evaluated with the experiment identical method with embodiment 2, synthesis result is shown in table 20, and figure 2 illustrates table 20 Result in tensile strength.

Table 19

	Raw material	Content
			1	Preparaton	40%
2	SLS	45%
			3	LA7	10%
4	Other	5%
				Water	170 (the piece solids relative to 100)

Table 20

As shown in table 20 and Fig. 2, it is used as when mixing starch and together preparaton (i.e. comprising component starch as piece) When, solution suction phenomenon (poor compatibility) occurs for surfactant after the drying, and as content of starch increases, the intensity drop of piece It is low.In addition, with the increase of content of starch, dissolubility also reduces.Thus, it is found that it is used to wash according to present disclosure in manufacture Preferably without using starch during the piece washed.The problem of in order to overcome compatibility and tensile strength, exist to have to increase and prepared in piece The defects of agent content (being more than or equal to 50%), in order to improve dissolubility, the defects of having to gelling starches first be present.

The original claims that herein below corresponds in parent application, are now incorporated to this as part of the specification Place：

1. a kind of piece for being used to wash, it is made using polyvinyl alcohol or based on the copolymer of polyvinyl alcohol as polymer Make and it includes surfactant, wherein the surfactant without ethylene oxide group and is in the structure non-aromatic Race.

2. the piece for being used to wash according to item 1, wherein described in the structure without ethylene oxide group and to be non- Aromatic surfactant is by RSO₄ ^-M⁺The alkyl sulfate, alpha-alkene sulfonate, alkanesulfonic acid of (M is alkali metal) expression Alkali metal salt, aliphatic methyl esters sulfonic acid alkali metal salts, aliphatic acid, alkylglycoside or its mixture.

3. the piece for being used to wash according to item 1, wherein the surfactant is included with 8 to 18 carbon atoms Alkali metal alkyl sulfates.

4. the piece for being used to wash according to item 3, wherein the alkali metal alkyl sulfates are NaLSs.

5. the piece for being used to wash according to item 1, wherein described in the structure without ethylene oxide group and to be non- Aromatic surfactant is the 50 weight % that content is the total content based on the surfactant or more main table Face activating agent.

6. the piece for being used to wash according to item 3, wherein it is based on described that the alkali metal alkyl sulfates, which are contents, 50 weight % of the total content of surfactant or more principal surfactant.

7. the piece for being used to wash according to item 5 or 6, wherein the content of the principal surfactant is based on described 60 weight % of the total content of surfactant or more.

8. the piece for being used to wash according to item 1, wherein the total content of the surfactant is based on described 40 weight % of gross weight to 70 weight %, and the total content of the polyvinyl alcohol or the copolymer based on polyvinyl alcohol For the 30 weight % to 50 weight % of the gross weight based on described.

9. the piece for being used to wash according to item 1, wherein the polyvinyl alcohol or the copolymerization based on polyvinyl alcohol The number-average molecular weight of thing is 20,000 to 50,000.

10. the piece for being used to wash according to item 1, wherein the polymer is polyvinyl alcohol, the polyvinyl alcohol Saponification degree is 80% to 90%.

11. the piece for being used to wash according to item 1, wherein in addition to the principal surfactant, described also Comprising epoxide ethylization in heptan laruyl alcohol (LA7), nonyl epoxide ethylization laruyl alcohol (LA9) or its mixture as cosurfactant Agent.

12. the piece for being used to wash according to item 11, wherein the principal surfactant is lived with the auxiliary surface Mixed weight ratio (the principal surfactant of property agent：The cosurfactant) it is 90: 10 to 60: 40.

13. the piece for being used to wash according to item 11, wherein the polyvinyl alcohol described in described or described based on poly- The total content of the copolymer of vinyl alcohol is to include the moon to 50 weight % based on 30 weight % of the gross weight of dried described For osmanthus base alkali metal persulfates as the principal surfactant, its content is 30 weight % to 60 weight %, the supplementary table The total content of face activating agent is 10 weight % to 20 weight %.

14. the piece for being used to wash according to item 1, wherein the piece for being used to wash passes through comprising via bubbling process The hole of formation and there is improved water solubility.

15. the piece for being used to wash according to item 14, wherein the proportion of the piece for being used to wash is 0.6 to 0.9.

A kind of 16. piece for being used to wash, comprising polymer, surfactant and alkaline auxiliary lotion, wherein the polymer It is the copolymer based on polyvinyl alcohol for including the monomeric unit with carboxyl, the surfactant is free of epoxy in the structure Ethane group and for non-aromatic.

17. the piece for being used to wash according to item 16, wherein the copolymer includes formula 1 below or 2 ethene Alcohol unit and anionic monomer unit, the content of the anionic monomer unit is 0.5mol% to 5mol%：

The ＞ of ＜ chemical formulas 1

The ＞ of ＜ chemical formulas 2

Wherein, R₁、R₂And R₃Each independently be H or methyl, and n is independently 0 to 3 integer.

18. the piece for being used to wash according to item 16, wherein described be free of ethylene oxide group and be in the structure The surfactant of non-aromatic is by RSO₄ ^-M⁺The alkyl sulfate, alpha-alkene sulfonate, alkane sulphur of (M is alkali metal) expression Acid alkali metal salt, aliphatic methyl esters sulfonic acid alkali metal salts, aliphatic acid, alkylglycoside or its mixture.

19. the piece for being used to wash according to item 16, wherein the surfactant includes having 8 to 18 carbon atoms Alkali metal alkyl sulfates.

20. the piece for being used to wash according to item 19, wherein the alkali metal alkyl sulfates are NaLSs.

21. the piece for being used to wash according to item 19, wherein the alkali metal alkyl sulfates are contents for based on institute State 60 weight % of the total content of surfactant or more principal surfactant.

22. the piece for being used to wash according to item 16, wherein the total content of the surfactant is based on described Gross weight 40 weight % to 70 weight %, the total content of the copolymer based on polyvinyl alcohol is total based on described 30 weight % of weight to 50 weight %.

23. the piece for being used to wash according to item 16, wherein the equal molecule of number of the copolymer based on polyvinyl alcohol Measure as 20,000 to 50,000.

24. the piece for being used to wash according to item 16, wherein the saponification degree of the copolymer based on polyvinyl alcohol is 60% to 85%.

25. the piece for being used to wash according to item 16, wherein in addition to the principal surfactant, described also Comprising epoxide ethylization in heptan laruyl alcohol (LA7), nonyl epoxide ethylization laruyl alcohol (LA9) or its mixture as cosurfactant Agent.

26. the piece for being used to wash according to item 16, wherein the piece for being used to wash passes through comprising via bubbling Journey formed hole and there is improved water solubility.

27. the piece for being used to wash according to item 26, wherein the proportion of the piece for being used to wash is 0.6 to 0.9.

28. the piece for being used to wash according to item 1 or 16, wherein not starch-containing in the chip base sheet.

29. a kind of method for manufacturing the piece for washing, including：

Preparation includes polyvinyl alcohol or copolymer and the solution of surfactant based on polyvinyl alcohol；

The solution is bubbled；And

Dry the solution.

30. according to the method described in item 29, wherein the surfactant includes the alkyl sulfide with 8 to 18 carbon atoms Acid alkali metal salt.

Claims

1. a kind of piece for being used to wash, it is manufactured simultaneously using polyvinyl alcohol or based on the copolymer of polyvinyl alcohol as polymer And it includes surfactant, wherein the surfactant includes the alkali metal alkyl sulfates with 8 to 18 carbon atoms, And the alkali metal alkyl sulfates with 8 to 18 carbon atoms are that content is the total content based on the surfactant 60 weight % or more principal surfactant.

2. the piece according to claim 1 for being used to wash, wherein the total content of the surfactant is based on described Gross weight 40 weight % to 70 weight %, and the polyvinyl alcohol or the copolymer based on polyvinyl alcohol always contain Measure the 30 weight % to 50 weight % for the gross weight based on described.

3. the piece according to claim 1 for being used to wash, wherein the polyvinyl alcohol or being total to based on polyvinyl alcohol The number-average molecular weight of polymers is 20,000 to 50,000.

4. the piece according to claim 3 for being used to wash, wherein the polyvinyl alcohol or being total to based on polyvinyl alcohol The number-average molecular weight of polymers is 20,000 to 30,000.

5. the piece according to claim 1 for being used to wash, wherein the polymer is polyvinyl alcohol, the polyvinyl alcohol Saponification degree is 80% to 90%.

6. the piece according to claim 5 for being used to wash, wherein the polyvinyl alcohol described in described or described based on poly- The total content of the copolymer of vinyl alcohol is to 50 weight %, as master based on 30 weight % of the gross weight of dried described The content for wanting the alkali metal alkyl sulfates with 8 to 18 carbon atoms of surfactant is 30 weight % to 60 weights % is measured, the total content of cosurfactant is 10 weight % to 20 weight %.

7. it is according to any one of claim 1 to 6 be used for wash piece, wherein it is described be used for wash piece include bubble and Improve water-soluble.

8. the piece according to any one of claim 1 to 6 for being used to wash, wherein the proportion of the piece for being used to wash is 0.6 to 0.9.

A kind of 9. piece for being used to wash, comprising polymer, surfactant and alkaline auxiliary lotion, wherein the polymer is to include The copolymer based on polyvinyl alcohol of monomeric unit with carboxyl, the surfactant include having 8 to 18 carbon atoms Alkali metal alkyl sulfates, and the alkali metal alkyl sulfates with 8 to 18 carbon atoms are contents for based on institute State 60 weight % of the total content of surfactant or more principal surfactant.

10. the piece according to claim 9 for being used to wash, wherein the copolymer includes formula 1 below or 2 ethene Alcohol unit and anionic monomer unit, the content of the anionic monomer unit is 0.5mol% to 5mol%：

The ＞ of ＜ chemical formulas 1

The ＞ of ＜ chemical formulas 2

Wherein in the chemical formula 1 and 2, R₁、R₂And R₃Each independently be H or methyl, and n is independently 0 to 3 Integer.

11. the piece according to claim 9 for being used to wash, wherein the total content of the surfactant is based on described Gross weight 40 weight % to 70 weight %, the total content of the copolymer based on polyvinyl alcohol is total based on described 30 weight % of weight to 50 weight %.

12. the piece according to claim 9 for being used to wash, wherein the equal molecule of number of the copolymer based on polyvinyl alcohol Measure as 20,000 to 50,000.

13. the piece according to claim 9 for being used to wash, wherein the saponification degree of the copolymer of the polyvinyl alcohol is 60% To 85%.

14. the piece for being used to wash according to any one of claim 9 to 13, wherein the piece for being used to wash includes bubble And improve water-soluble.

15. the piece for being used to wash according to any one of claim 9 to 13, wherein the proportion of the piece for being used to wash For 0.6 to 0.9.

16. the piece for being used to wash according to any one of claim 1 to 6 and 9 to 13, wherein described includes by described The weight % of dry weight meter 0 of piece to 5 weight % starch.

17. a kind of method for manufacturing the piece for washing, including：

(S1) solution is prepared, the solution includes polyvinyl alcohol or copolymer based on polyvinyl alcohol and total based on surfactant 60 weight % of content or more the alkali metal alkyl sulfates with 8 to 18 carbon atoms；

(S2) solution is bubbled；And

(S3) solution is dried.