CN111575121B

CN111575121B - Water-soluble concentrated gel cleaning agent, preparation method and washing and cleaning method

Info

Publication number: CN111575121B
Application number: CN202010416691.9A
Authority: CN
Inventors: 麦贤杰; 康鹏; 胡程伟; 封宗瑜; 劳承云
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-06-04
Anticipated expiration: 2040-05-15
Also published as: CN111575121A

Abstract

The invention discloses a water-soluble concentrated gel cleaning agent, a preparation method and a washing and cleaning method, wherein the mixture comprises the following raw material components in parts by weight: rheology modifier: 20-30%, chelating agent: 5-20%; dispersing agent: 5-15%, nonionic surfactant: 10-30%; plant essential oil: 0.3-1%; enzyme preparation: 1-5%; acidity regulator: 0.1-1%; solubilizer: 3-8%; preservative: 0.1-1%; antibacterial agents: 0.1-3%; deionized water: the water-soluble concentrated gel detergent with certain hardness is prepared by adding 100% of the materials and the like, so that the cleanliness can be improved, and the cleaning effect is better; meanwhile, the prepared gel cleaning agent can be gradually dissolved in the surface layer under the washing and shearing action of water and diluted into a detergent with a certain concentration, so that the gel cleaning agent is convenient to use, and frequent addition of cleaning agents is reduced.

Description

Water-soluble concentrated gel cleaning agent, preparation method and washing and cleaning method

Technical Field

The invention belongs to the technical field related to cleaning agents, and particularly relates to a water-soluble concentrated gel cleaning agent, a preparation method and a washing and cleaning method.

Background

In recent years, with the improvement of the living standard and the acceleration of the life rhythm of the people in China, the household dish washing machine is concerned by more and more Chinese families as a new generation of necessary household appliances and becomes a mark of convenient, fashionable and healthy life. And the special detergent for the dish washing machine is produced accordingly.

Different from other dish washing agents, the special washing agent for the dish washing machine is designed according to the operating condition and the program of the dish washing machine, and the main requirements of consumers for the washing agent are convenient use, high efficiency, low foam, multiple-effect integration, stain removal, no trace and the like.

At present, the special detergent for the dish washing machine in the market mainly takes powder, liquid and tablets as main raw materials. On one hand, the cleaning effect is not good, and on the other hand, when the powder and liquid products are used, a proper amount of cleaning agent needs to be manually measured and then put in; the tablet product is cut into fixed dosage by the production process during production, but the tablet product still needs to be manually put in each adding, so that the action frequency of a consumer is increased to a certain extent; and at present, the used product is a common one-time release product regardless of any dosage form, and the content of effective components in the product is limited, so that the product cannot be used for multiple times.

Disclosure of Invention

The invention aims to provide a water-soluble concentrated gel cleaning agent, a preparation method and a washing and cleaning method, which aim to solve the problems of the background art.

In order to achieve the purpose, the specific technical scheme of the water-soluble concentrated gel cleaning agent, the preparation method and the washing and cleaning method is as follows:

the water-soluble concentrated gel detergent comprises the following raw material components in percentage by weight:

wherein the rheology modifier is one or a mixture of ester-terminated polyamide, tertiary amine-terminated polyamide, polyepoxy-terminated polyamide and polyether polyamine. The dispersant is one or more of acrylic acid homopolymer or copolymer and maleic acid homopolymer or copolymer, and the molecular weight of the dispersant is 3000-70000.

The nonionic surfactant is one or more of capped alcohol ether, propylene glycol block polyether, alkyl glycoside and fatty alcohol alkoxy compound.

Further, the chelating agent is one or more of sodium citrate dihydrate, sodium gluconate, sodium glucoheptonate, trisodium nitrilotriacetate, trisodium Methylglycinediacetate (MGDA), tetrasodium glutamate diacetate (GLDA) and disodium ethylene diamine tetraacetate.

Further, the plant essential oil is selected from one or more of lemon essential oil, thyme essential oil, cherry blossom essential oil, mint essential oil, green tea essential oil and magnolia flower essential oil.

Furthermore, the enzyme preparation is one or a mixture of more of protease, mannanase, carbohydrase, lipase and oxidase, and the content of enzyme active substances is more than 10000 BPU/g.

Further, the acidity regulator is one or a mixture of citric acid, malic acid, tartaric acid, malonic acid, lactic acid and triethanolamine.

Further, the solubilizer is sodium salt, potassium salt or ammonium salt of toluenesulfonic acid, dimethylbenzene sulfonic acid or isopropylbenzene sulfonic acid, and one or more of ethanol, isopropanol, ethylene glycol monobutyl ether and alkyl phosphate.

Further, the preservative is one or a mixture of more of cason, phenoxyethanol and benzyl alcohol.

Further, one or more of N-alkyl propylamine glycine, triclosan, dichlorohenine and methylene guanidine salt of the antibacterial agent are mixed.

A method of making a water soluble concentrated gel cleanser comprising the steps of:

a. firstly adding a powder solid raw material into deionized water, and uniformly and completely stirring and dissolving to obtain a solution a, wherein the powder solid raw material is a granular chelating agent, a powdery dispersing agent and a powder solubilizer;

b. adding a nonionic surfactant, a liquid chelating agent, a liquid dispersing agent and a liquid solubilizer into the solution a, and uniformly stirring and dispersing; adding an acidity regulator, and adjusting the pH value of the solution to obtain a solution b;

c. adding a rheology modifier into the solution b, stirring, mixing and heating until the rheology modifier is softened, and uniformly mixing;

d. cooling to 50 + -5 deg.C while stirring, adding plant essential oil, enzyme preparation, antiseptic and antibacterial agent, stirring and dispersing; keeping the constant temperature flowing state, adding into a shape mold, and cooling and molding.

And further, adjusting the pH value of the solution to 6-9 by using the acidity regulator in the step b.

Further, in the step c, stirring, mixing and heating are carried out until the softening temperature of the rheology modifier is 83-100 ℃.

A rinsing and cleaning method, wherein the water-soluble concentrated gel cleaning agent is used for rinsing and cleaning, and a dispenser is used for dissolving and dispensing the water-soluble concentrated gel cleaning agent;

the distributor comprises a water injection pipe, a kit for placing a water-soluble concentrated gel cleaning agent sample, a water injection pipe communicated with an opening at the upper part of the kit, a water outlet pipe communicated with an outlet at the lower part of the kit, and a water pipe automatic control valve arranged on the water injection pipe;

the water that comes out through the water injection pipe erodes the sample in to the kit inner chamber and cuts, dissolves the sample top layer gradually, dilutes into the detergent of certain concentration, flows from the outlet pipe again and carries out the clean object in back.

Compared with the prior art, the invention has the following beneficial effects:

1. the water-soluble concentrated gel cleaning agent with certain hardness is prepared by introducing the rheology modifier, the concentration process and the formula, and can effectively improve the cleanliness and achieve better cleaning effect.

2. The prepared gel cleaning agent can gradually dissolve the surface layer under the washing shear of water and is diluted into a detergent with a certain concentration; the prepared gel main body has a hard appearance, only the surface layer is dissolved and slightly reduced, and the shape is not obviously changed, so the purpose of multiple use can be achieved.

Drawings

FIG. 1 is a schematic view of the internal construction of a dispenser according to the present invention;

fig. 2 is a top view of fig. 1.

The reference numbers in the figures illustrate: a water injection pipe 1, a water outlet pipe 2, a reagent box 3, a water pipe automatic control valve 4 and a sample 5.

Detailed Description

For a better understanding of the objects, structure and function of the invention, reference should be made to the following examples which are set forth to illustrate, but are not to be construed as the limit of the invention.

The following examples were prepared according to the components and amounts, respectively, specified in table 1 below, in the same manner, including the steps of:

a. adding powdery solid raw materials (such as granular chelating agent, powdery dispersant and powdery solubilizer) into deionized water, and stirring to dissolve uniformly and completely to obtain solution a;

b. adding a nonionic surfactant, a liquid chelating agent, a liquid dispersing agent and a liquid solubilizer into the solution a, and uniformly stirring and dispersing; adding an acidity regulator, and adjusting the pH value of the solution to 6-9 to obtain a solution b;

c. adding a rheological modifier into the solution b, stirring, mixing and heating until the rheological modifier is softened, controlling the temperature to be 83-100 ℃, and uniformly mixing;

The ratio (weight ratio) of water-soluble concentrated gel detergent to wash water described in all examples was 1: 1500-. The dissolving amount (by weight) of the gel in the dispenser by single quantitative water feeding and washing is as follows: 1.0-1.5 g, washing the dissolved detergent quantitatively by a distributor, entering the bowl washing tank, and further mixing and diluting with washing water.

The water-soluble concentrated gel cleanser can improve the cleanness, and the physical property of the cleanser is a water-soluble gel with a stable form, and the aqueous solution mixture with a flowing form is changed into a gel solid with certain hardness and a stable form by the rheology modifier.

1. The product of the invention is placed in the kit 3 in the distributor in figure 1, the washing mode is selected, the dishwasher is started to operate, in the first water inlet stage of the dishwasher, the water injection pipe 1 of the distributor in figure 1 is opened through the controller, quantitative water is injected, the surface of the cut sample 5 is washed, the sample 5 is dissolved to obtain a cleaning agent with a certain concentration, and the cleaning agent flows into the bowl washing groove of the dishwasher.

2. After a certain amount of water is injected, the automatic control valve 4 of the water pipe of the distributor is closed, and the distributor is in a sealing state.

Example 1

1. The rheology modifier selects a CRODA CrystaSense polyether polyamine HP series with higher polarity and good water solubility, the softening temperature is 93-105 ℃, and conditions are created for gel construction.

2. The chelating agent is preferably selected from sodium citrate dihydrate, sodium gluconate, methylglycine diacetate trisodium salt (MGDA) and disodium ethylene diamine tetraacetate which are economical and have good chelating capacity for calcium and magnesium ions.

3. The dispersing agent is matched by adopting acrylic acid homopolymer or copolymer with high and low molecular weight, and acrylic acid homopolymer or copolymer with molecular weight of 3000-4500 and molecular weight of 70000 is matched to be suitable for different types of dirt, so that good dispersing and scale inhibiting performance is provided, dirt agglomeration or redeposition is inhibited, and the detergency is improved.

4. The nonionic surfactant is selected from propylene glycol block polyether, alkyl glycoside and fatty alcohol alkoxy compound low-foaming surfactant, and because the washing of the dish-washing machine is a continuous spraying and recycling process, the requirement on foam is high, and the washing spraying effect is directly influenced by overhigh foam in the washing process, so the low-foaming surfactant is selected.

5. The plant essential oil is selected from edible essence, such as lemon essential oil and peppermint essential oil.

6. According to the main components of dirt in food, the enzyme preparation is selected from protease, amylase, lipase and cellulase, and the content of enzyme active substances is more than 10000 BPU/g.

The water-soluble concentrated gel detergent is a gel system based on the combined action of a surfactant and an enzyme, the gel is used as a shape structure carrier, and the effective component of the gel detergent is regarded as 100%. The system preferably contains 15-25% of surfactant and 3-5% of enzyme, so that the concentration of washing liquid components formed when the concentrated gel detergent is washed and dissolved by washing water can maintain effective cleaning performance on food dirt. Preferred surfactant systems are derived from the list of raw materials (ingredients) for detergents for food under class a.

7. The acidity regulator is citric acid.

8. The solubilizer is sodium xylene sulfonate.

9. The antiseptic is prepared by mixing Kathon, phenoxyethanol, and benzyl alcohol.

10. The antibacterial agent is preferably a mild and environment-friendly amino acid amphoteric surfactant N-alkyl propylamino glycine, and has the characteristics of safety, no pollution, broad-spectrum sterilization, biodegradability and high activity at low temperature. Has obvious effects on gram-positive bacteria, gram-negative bacteria, microzyme, fungi, staphylococcus aureus, escherichia coli, pseudomonas aeruginosa, candida albicans and the like.

Example 2

2. The chelating agent is selected from sodium citrate dihydrate, sodium glucoheptonate and tetrasodium glutamate diacetate (GLDA).

3. The dispersing agent is matched by adopting acrylic acid homopolymer or copolymer with high and low molecular weight, and the acrylic acid homopolymer or copolymer with molecular weight of about 3000-4500 and molecular weight of about 70000 is matched so as to be suitable for different types of dirt, provide good dispersing and scale inhibiting performance, inhibit dirt agglomeration or redeposition and improve detergency.

4. The nonionic surfactant is selected from alcohol ether and fatty alcohol alkoxy compounds, and the washing of the dish-washing machine is a continuous spraying and recycling process, so that the requirement on foam is high, and the washing and spraying effects are directly influenced by overhigh foam in the washing process, so that the low-foaming surfactant is selected.

5. The plant essential oil is selected from edible essence such as thyme essential oil.

6. According to the main components of dirt in food, the enzyme preparation is selected from protease, amylase and pectate lyase, and the content of enzyme active substance is more than 10000 BPU/g.

7. The acidity regulator is malic acid.

8. The solubilizer is sodium cumenesulfonate.

9. The antiseptic is Kathon.

10. The antibacterial agent is triclosan.

Example 3

1. The rheology modifier is selected from the LP series of CRODA CrystaSense ester-terminated polyamide or tertiary amine-terminated polyamide, the softening temperature is 83-94 ℃, and conditions are created for gel construction.

2. The chelating agent is selected from sodium citrate dihydrate, sodium glucoheptonate, trisodium nitrilotriacetate, and tetrasodium glutamate diacetate (GLDA).

3. The dispersant is an acrylic acid homopolymer with the molecular weight of 3000-5000-.

4. The nonionic surfactant is selected from the mixture of end-capped alcohol ether, propylene glycol block polyether and fatty alcohol alkoxy compound low-foaming surfactant.

5. The plant essential oil is selected from edible essence, such as peppermint essential oil and green tea essential oil.

6. The enzyme preparation is a mixture of protease, amylase, lipase and cellulase, and the content of enzyme active substances is more than 10000 BPU/g.

7. The acidity regulator is lactic acid.

8. The solubilizer is mixture of sodium xylene sulfonate and ethanol.

9. The antiseptic is mixture of phenoxyethanol and benzyl alcohol.

10. The antibacterial agent is selected from amino acid amphoteric surfactant N-alkyl propylamine glycine.

Example 4

1. The rheology modifier is selected from LP series of ester-terminated polyamide or tertiary ammonium-terminated polyamide of CRODA CrystaSense, the softening temperature is 83-94 ℃, and conditions are created for gel construction.

2. The chelating agent is selected from sodium gluconate, methylglycine diacetate trisodium salt (MGDA) and disodium ethylene diamine tetraacetate.

3. The dispersant is maleic acid homopolymer with molecular weight of 3000-5000.

4. The nonionic surfactant is selected from alkyl glycoside and fatty alcohol alkoxy compound.

5. The plant essential oil is selected from edible essence and flos Magnoliae essential oil.

6. The enzyme preparation is a mixture of protease, lipase and mannase, and the content of enzyme active substances is more than 10000 BPU/g.

7. The acidity regulator is triethanolamine.

8. The solubilizer is a mixture of potassium cumenesulfonate and ethylene glycol monobutyl ether.

9. The antiseptic is mixture of phenoxyethanol and benzyl alcohol.

10. Antibacterial agents methylene guanidinium salts.

Example 5

1. Rheology modifiers, preferably the polyepoxide-terminated polyamide MP series of CRODA CrystaSense, with a softening temperature of 90-100 ℃.

2. The chelating agent is selected from sodium gluconate, trisodium nitrilotriacetate, trisodium Methylglycinediacetate (MGDA) and disodium ethylenediamine tetraacetic acid.

3. The dispersant is an acrylic acid homopolymer with the molecular weight of 4000-12000.

4. The nonionic surfactant is selected from low-foaming surfactants such as end-capped alcohol ether, propylene glycol block polyether, alkyl glycoside and the like.

5. The plant essential oil is selected from edible essence and green tea essential oil.

7. The acidity regulator is tartaric acid.

8. The solubilizer is a mixture of toluene sulfonic acid ammonium salt and isopropanol;

9. the preservative is Kathon;

10. the antibacterial agent is triclosan.

Example 6

2. The chelating agent is selected from sodium citrate dihydrate, sodium gluconate, and trisodium methylglycine diacetate (MGDA).

4. The nonionic surfactant is selected from the mixture of the end-capped alcohol ether and the propylene glycol block polyether.

5. The plant essential oil is selected from edible essence such as lemon essential oil.

6. The enzyme preparation is a mixture of protease, mannase, lipase and oxidase, and the content of enzyme active substance is more than 10000 BPU/g.

7. The acidity regulator is malonic acid.

8. The solubilizer is xylene sulfonic acid potassium salt.

9. The antiseptic is mixture of phenoxyethanol and benzyl alcohol.

10. The antibacterial agent is N-alkyl propylamine glycine.

Example 7

1. The rheology modifier is selected from the series of CRODA CrystaSense polyepoxy terminated polyamide MP, and the softening temperature is 90-100 ℃.

2. The chelating agent is selected from sodium citrate dihydrate, sodium glucoheptonate and disodium ethylenediamine tetraacetate.

4. The nonionic surfactant is selected from the group consisting of alcohol ether and alkyl glycoside.

5. The plant essential oil is lemon essential oil.

6. The enzyme preparation is prepared by mixing protease, amylase, mannanase and cellulase.

7. The acidity regulator is citric acid.

8. The solubilizer is sodium xylene sulfonate.

9. The antiseptic is Kathon.

10. The antibacterial agent is triclosan.

Example 8

2. The chelating agent is sodium gluconate.

3. The dispersant is maleic acid homopolymer with molecular weight of 4000-12000.

4. The nonionic surfactant is selected from propylene glycol block polyether and alkyl glycoside.

5. The plant essential oil is thyme essential oil.

6. The enzyme preparation is mixture of protease, carbohydrase, lipase and oxidase.

7. The acidity regulator is tartaric acid.

8. The solubilizer is isopropanol.

9. The antiseptic is mixture of phenoxyethanol and benzyl alcohol.

10. The antibacterial agent is triclosan.

Example 9

2. The chelating agent is selected from trisodium nitrilotriacetate, tetrasodium glutamate diacetate (GLDA), and sodium glucoheptonate.

4. The nonionic surfactant is selected from fatty alcohol alkoxy compound.

5. The plant essential oil is selected from oriental cherry essential oil.

6. The enzyme preparation is prepared by mixing protease, carbohydrase, lipase and cellulase.

7. The acidity regulator is lactic acid.

8. The solubilizer is ethylene glycol monobutyl ether.

9. The antiseptic is benzyl alcohol.

10. The antibacterial agent is selected from methylene guanidine salts.

Table 1: examples table

The gel detergent prepared by the invention is used in a household dishwasher with a dispenser structure and used for decontamination and cleaning of tableware of the household dishwasher, and mainly considers the washing performance of the detergent on the dirt of the tableware.

In order to reduce the frequency of the charging action of the consumer. The product of the invention can be operated in the dispenser of fig. 1 and 2 of the present design, which can be connected to the water nozzles of dishwashers and other washing appliances, and then a rinsing cleaning method according to the invention is used, for example: the method is connected to a water gap of the existing dish washing machine, and the water outlet of the water gap flushes the sample 5 of the invention, and the method comprises the following specific steps:

firstly, placing the product sample 5 in the kit 3, selecting a washing mode, starting a dishwasher, starting the dishwasher in a first water inlet stage of the dishwasher, then opening the distributor through the controller to inject water 1, injecting quantitative water, scouring and shearing the surface of the sample 5, dissolving the sample 5 to obtain a cleaning agent with a certain concentration, and finally, flowing into a bowl washing groove of the dishwasher. After a certain amount of water is injected, the water pipe control valve of the distributor is automatically closed 4, and at the moment, the distributor is in a sealing state.

Wherein, the outlet of the lower part of the kit 3 is provided with a groove which is in the shape of an inverted frustum of a pyramid and can clamp the sample 5 of the water-soluble concentrated gel detergent, the water above the groove is impacted to impact the sample 5, and the surface layer of the sample 5 is washed, peeled and dissolved into the detergent.

Standard dirt is prepared according to the cleaning performance regulation 6 of GB/T20290 and 2006 domestic electric dishwasher performance test method, and tableware cleanliness evaluation after cleaning is carried out. The cleaning test evaluation approximate standard is as follows (see the detail application: GB/T20290-2006 domestic electric dishwasher Performance test method stipulation 6.7):

table 2: cleaning test evaluation table

Table 3: the standard tableware number and soil smear weight were as follows:

a dishwasher is selected to be used for carrying out washing performance evaluation in an energy-saving washing (standard washing) mode, the full score is 5, the higher the cleaning index is, the better the cleaning performance is, and the test result is as follows:

table 4:

examples	Index of cleanliness
		Example 1	4.96
Example 2	4.83
		Example 3	4.92
Example 4	4.86
		Example 5	4.85
Example 6	4.84
		Example 7	4.91
Example 8	4.88
		Example 9	4.94

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The water-soluble concentrated gel detergent is characterized in that the mixture comprises the following raw materials in percentage by weight:

wherein the rheology modifier is one or more of ester-terminated polyamide, tertiary amine-terminated polyamide, polyepoxy-terminated polyamide and polyether polyamine;

the dispersant is one or more of acrylic acid homopolymer or copolymer and maleic acid homopolymer or copolymer, and the molecular weight of the dispersant is 3000-70000;

2. The water soluble concentrated gel cleaner of claim 1, wherein the chelating agent is one or more of sodium citrate dihydrate, sodium gluconate, sodium glucoheptonate, trisodium nitrilotriacetate, trisodium Methylglycinediacetate (MGDA), tetrasodium glutamate diacetate (GLDA), disodium ethylenediaminetetraacetate.

3. The water soluble concentrated gel cleaner of claim 1, wherein said plant essential oil is selected from the group consisting of lemon essential oil, thyme essential oil, cherry essential oil, peppermint essential oil, green tea essential oil, and magnolia essential oil.

4. The water soluble concentrated gel cleaner of claim 1, wherein the enzyme preparation is a mixture of one or more of protease, mannanase, carbohydrase, lipase, oxidase, and the content of enzyme activity is > 10000 BPU/g.

5. The water soluble concentrated gel cleaner of claim 1, wherein the acidity regulator is one or more of citric acid, malic acid, tartaric acid, malonic acid, lactic acid, triethanolamine.

6. The water soluble concentrated gel cleaner of claim 1, wherein the solubilizing agent is one or more of sodium, potassium, ammonium salts of toluene sulfonic acid, xylene sulfonic acid, and cumene sulfonic acid, and mixtures of ethanol, isopropanol, ethylene glycol monobutyl ether, and alkyl phosphate esters.

7. The water soluble concentrated gel cleaner of claim 1, wherein the preservative is one or more of cason, phenoxyethanol, and benzyl alcohol.

8. The water soluble concentrated gel cleaner of claim 1, wherein the antimicrobial agent is one or more of the group consisting of N-alkyl propylamino glycine, triclosan, and methylene guanidine salts.

9. A method of making the water soluble concentrated gel cleaner of claim 1, comprising the steps of:

b. adding a nonionic surfactant and a liquid solubilizer into the solution a, and uniformly stirring and dispersing; adding an acidity regulator, and adjusting the pH value of the solution to obtain a solution b;

10. The method of claim 9, wherein the acidity regulator in step b is adjusted to a pH of 6 to 9.

11. The method of claim 9, wherein the step c is performed by mixing and heating the mixture to a softening temperature of 83-100 ℃.

12. A rinse-cleaning method using the water-soluble concentrated gel cleaner of claims 1-8 for rinse-cleaning, further comprising using a dispenser to dispense the water-soluble concentrated gel cleaner for dissolution;

the distributor comprises a water injection pipe (1), a kit (3) for placing a water-soluble concentrated gel cleaning agent sample (5), the water injection pipe (1) communicated with an opening at the upper part of the kit (3), a water outlet pipe (2) communicated with an outlet at the lower part of the kit (3), and a water pipe automatic control valve (4) arranged on the water injection pipe (1);

the water that comes out through water injection pipe (1) washes away the shearing to sample (5) in kit (3) inner chamber, dissolves sample (5) top layer gradually, dilutes into the detergent of certain concentration, flows from outlet pipe (2) again and carries out the back and clean the object.