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Light-promoted stain removal system

a stain removal and light-promoted technology, applied in the field of stain removal, can solve the problems of user skin being injured, requiring a comparatively longer time to diminish the stain color, and the reaction of bleaching is not very effective, so as to achieve convenient handling and portability, good substitution of heat, and fast stain removal

Pending Publication Date: 2020-08-27
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a stain removal system that uses light to quickly remove stains on clothes. The system is small and portable, making it easy to use at home or while wearing the clothes. The light source is designed to firmly hold a bleach chemical cartridge and prevent any leaks. The technical effects of this invention include faster stain removal, user convenience, and effective stain removal with minimal damage to clothes.

Problems solved by technology

As the H2O2 concentration in commercial stain removing products is low, the bleaching reaction is not very effective and requires comparatively longer time to diminish the stain color, normally 5 min to 30 min treatment time is needed depending on the stain age and stain type.
But there is a risk of user's skin being injured if apply the high temperature stain removal system without taking off the stained cloth.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0038]In the following, a bleach chemical refers to a group of chemicals that work through oxidation mechanisms to remove a stain. Including liquid type of bleach chemical like hydrogen peroxide and peroxy acids and solid type of bleach chemical like sodium percarbonate, sodium perborate, carbamide peroxide, etc.

[0039]The invention is based on the principle that light activation of hydrogen peroxide H2O2 helps peroxide decompose faster to form free radicals that react with organic molecules (stain colors).

Below is the light activated free radical generation:

H2O2+hv→2 OH.  (1)

OH.+H2O2→HO2.+H2O  (2)

HO2.+H2O2→OH.+H2O+O2  (3)

2 HO2.→H2O2+O2  (4)

[0040]In above chemical reactions, “hv” corresponds to the chemical equation for photon.

[0041]Selection of the light source, wavelength, intensity and exposure time affect the bleaching efficiency.

[0042]Light source can for example correspond to UV light which has a high photon energy. Blue light can also be considered. Although light source of lo...

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Abstract

Stain removal system (101) for treating a stained area (102) on a cloth (103), said stain removal system (101) comprises a container (104) for containing a bleach chemical, wherein the container (104) is a removable cartridge, a system (105) for carrying the bleach chemical to the stained area under a liquid form, and a light source (106) for generating light radiation (107) over the stained area (102).

Description

FIELD OF THE INVENTION[0001]The invention relates to the field of stain removal.[0002]The invention may for example be used in the field of fabric care, such as garment care.BACKGROUND OF THE INVENTION[0003]Oxidizing agents are widely used in area of cleaning, disinfecting and bleaching. Oxidizing agents like hydrogen peroxide having formula H2O2, carbamide, sodium percarbonate, sodium perborate are also very widely added in laundry powders and detergents to remove stains on garment.[0004]The chemical reacting mechanism of stain removing by oxidization mechanism is illustrated by FIG. 12.[0005]The stain comprises colored molecule (chromophore) defining a first product P1.[0006]The colored molecule is then oxidized by an oxidization agent or bleach, resulting in an intermediate product P2.[0007]Water is then applied to the intermediate product, resulting in a colorless molecule defining a final product P3.[0008]As the H2O2 concentration in commercial stain removing products is low, t...

Claims

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Application Information

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IPC IPC(8): D06B11/00D06L4/50D06L4/70D06L4/13
CPCD06B11/0093D06B11/0073D06L4/13D06B11/0063D06L4/50D06L4/70D06B2700/36B08B7/0035D06F43/002
Inventor LIAO, YILEPRAVEEN, KANNAN UDAYAPPAN
Owner KONINKLJIJKE PHILIPS NV
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