Process of treating laundry in laundry driers
First Claim
1. IN A PROCESS OF SUBJECTING LAUNDRY TO A FINISHING TREATMENT, THE IMPROVEMENT WHICH CONSISTS IN THE STEPS OF A. PREDRYING THE LAUNDRY TO A MOISTURE CONTENT BETWEEN ABOUT 5 PERCENT AND ABOUT 70 PERCENT SUBSEQUENTLY TO THE RINSING STEP, B. SPRAYING UPON THE PREDRIED LAUNDRY A COMPOSITION CONTAINING AT LEAST ONE CONVENTIONAL AGENT FOR TREATING LAUNDRY TO IMPROVE ITS PROPERTIES, AND C. COMPLETING DRYING.
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Accused Products
Abstract
The novel and advantageous process of treating laundry comprises predrying the washed and rinsed laundry to a predetermined degree of dryness such as to a moisture content between 5 and 70 percent and preferably to a moisture content of about 15 percent, subjecting the predried laundry, preferably in a laundry drier, to the action of laundry treating agents, such as brighteners, antistatic, softening, aromatizing, and the like agents, preferably by spraying said agents thereon, and completing drying of the laundry. Thereby, any moldy smell of the laundry and/or its becoming electrostatically charged are eliminated and/or the properties of the finished laundry are considerably improved. Drying is preferably effected in laundry dryers of the tumbler type and the treating composition is preferably sprayed on the laundry in aerosol form.
54 Citations
12 Claims
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1. IN A PROCESS OF SUBJECTING LAUNDRY TO A FINISHING TREATMENT, THE IMPROVEMENT WHICH CONSISTS IN THE STEPS OF A. PREDRYING THE LAUNDRY TO A MOISTURE CONTENT BETWEEN ABOUT 5 PERCENT AND ABOUT 70 PERCENT SUBSEQUENTLY TO THE RINSING STEP, B. SPRAYING UPON THE PREDRIED LAUNDRY A COMPOSITION CONTAINING AT LEAST ONE CONVENTIONAL AGENT FOR TREATING LAUNDRY TO IMPROVE ITS PROPERTIES, AND C. COMPLETING DRYING.
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2. The process of claim 1, in which solutions of such agents are sprayed upon the predried laundry.
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3. The process of claim 1, in which emulsions of such agents are sprayed upon the predried laundry.
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4. The process of claim 1, in which the laundry is predried in step (a) to a moisture content of about 15 percent.
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5. The process of claim 1, in which the treating composition is sprayed automatically upon the laundry, said spraying being initiated by an impulse controlled by and dependent on the drying time.
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6. The process of claim 1, in which the spraying step is automatically initiated at a predetermined degree of dryness.
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7. The process of claim 1, in which the composition consists of 10 parts to 50 parts of a non-combustible aerosol propellant, 0.5 parts to 80 parts of water, 0.0 parts to 50 parts of a cationic surface active treating agent, 0.0 parts to 5 parts of a deodorant, 0.0 parts to 5 parts of an optical brightener, and 0.0 parts to 5 parts of a perfume, at least one of said treating agents being present in said composition.
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8. The process of claim 1, in which the composition consists of 10 parts to 50 parts of a non-combustible aerosol propellant, 0.5 parts to 80 parts of water, 0.0 parts to 50 parts of a non-ionogenic treating agent, 0.0 parts to 5 parts of a deodorant, 0.0 parts to 5 parts of an optical brightener, and 0.0 parts to 5 parts of a perfume, at least one of said treating agents being present in said composition.
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9. The process of claim 7, in which at least part of the water is replaced by an organic solvent.
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10. The process of claim 8, in which at least part of the water is replaced by an organic solvent.
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11. In a process of subjecting laundry to a finishing treatment with at least one of the finishing agents selected from the group consisting of a cationic surface active treating agent, a non-ionogenic surface active treating agent, an antistatic agent, a perfume, a deodorant, an optical brightener, a dyestuff, a germicidal agent, a starching agent, and a softening agent, the improvement which consists in the steps of a. predrying the washed and rinsed laundry to a moisture content between about 5 percent and about 70 percent b. spraying upon the predried laundry a composition containing at least one of said finishing agents, and b. completing drying of the thus treated laundry.
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12. The process of claim 11, in which the rinsed laundry is predried in step (a) to a moisture content of about 15 percent.
Specification