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The use of enzymes for detergents

IP.com Disclosure Number: IPCOM000248839D
Publication Date: 2017-Jan-17
Document File: 4 page(s) / 125K

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The IP.com Prior Art Database

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The use of enzymes for detergents

Household cleaning is a daily worldwide activity, where billions of people use detergents to clean their

clothes. The use of enzymes detergent compositions is well known. The enzymes facilitate removal of

stains on textiles e.g. lipases facilitate removal of lipid stains. The use of enzymes in detergents result in

clothes that are cleaner than clothes washed without enzymes. However, enzymes may also have other

effects than stain removal.

It is known that enzymes besides cleaning can prevent re-deposition of dirt or colour during washing.

Washing black clothes together with white clothes may result in colour releasing from the black clothes

and re-deposit on the white clothes. Consumers are aware of this issue and usually sort their laundry

items in order to prevent this. However, enzymes can have an effect on redeposition of colour during

washing as shown in the below figure 1.

The figure shows in the right hand circle two t-shirts (100% cotton) each washed together with a pair of

new black jeans from H&M in an Asian pacific top loader washing machine. After washing the t-shirts

were cut in two. The right hand picture of figure shows two halves of t-shirts washed differently. The left

side of the t-shirt were washed with an Asian liquid detergent (2g/L) without the enzyme blend. The right

side of the t-shirt were washed in an Asian liquid detergent (2g/L) with the enzyme blend. Temperature

of water is 25ºC, waterhardness 14ºdH. The t-shirts were pre-aged by washing in a Wascator machine at

40ºC for 10h.

It is obvious from the picture that the t-shirt washed with the detergent compostion comprising the

enzyme blend is whiter, meaning that the black colour from the jeans were not absorbed by the t-shirt,

whereas the t-shirt washed in detergent composition without the enzyme blend has become grey.

The enzyme blend consist of the enzyme of with sequence SEQ ID NO: 1 and the enzyme of SEQ ID

NO: 3.

Figure 1: without with

enzyme enzyme

2

The enzyme blend can also be used for maintaining whiteness after more than one wash. Figure 2 shows

the whiteness of a cotton textile before washing, after five washes and after ten washes. The textiles are

washed in full scale wash under EU conditions. 75 grams of detergent composition is used per wash. Soil

donor is a WFK greying sock used in each wash.

The three columns at the left hand side of figure 2 shows the result of the textiles in a detergent composition

without enzymes. The three columns at the right hand side shows the result of washing with same

detergent composition further comprising 0.5% of an enzyme blend. As it can be seen from the figure

washing with the detergent composition with enzyme blend results in whiter textiles after multiple washes.

The enzyme blend consist of the enzyme of with sequence SEQ ID NO: 1 and the enzyme of SEQ ID NO:

3.

Figure 2: New 5 10 New 5 10

Without enzyme blend With enzyme blend

Enzymes such as cellulases can also be used for sof...