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US 11,534,715 B2Granted
Dust cover for automotive lamps with excellent moisture control performance
AssigneeDesiKhan Co., Ltd.
InventorsNak Cheon Choi, Eun Young Park, Jong Hyup Kim
Life of this patent
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Abstract
Provided is a dust cover having excellent moisture control performance which is applied to a car lamp. The dust cover having excellent moisture control performance has excellent lamp humidity adjustment ability, and thus, efficiently removes moisture present inside to prevent moisture dew condensation due to a rapid temperature difference beforehand, and furthermore, maintains humidity inside the lamp low to prevent corrosion or malfunction of mounted components.
Claims9
A dust cover, the dust cover comprising:
- a housing having a housing space formed inside and one open end;
- and
- a moisture absorption unit including an air-permeable film and a moisture absorbent which is sealed with the air-permeable film and provided in the housing space,
- wherein the moisture absorption unit has a moisture absorption rate of 150% or more and a release rate of 2% or less, and
- wherein the moisture absorbent includes:
- (A) 10 to 70 wt % of one or more hygroscopic materials selected from the group consisting of magnesium chloride, calcium chloride, and sodium carbonate;
- (B) 10 to 50 wt % of a curable inorganic substance comprising at least one or more selected from the group consisting of magnesium oxide and calcium oxide;
- (C) 5 wt % to 50 wt % of a polymer wax;
- and
- (D) an alkali metal phosphate salt included at 1 to 30 parts by weight, based on 100 parts by weight of the moisture absorbent.
7 more elements
A car lamp comprising a dust cover, the dust cover comprising:
- a housing having a housing space formed inside and one open end;
- and
- a moisture absorption unit including an air-permeable film and a moisture absorbent which is sealed with the air-permeable film and provided in the housing space,
- wherein the moisture absorption unit has a moisture absorption rate of 150% or more and a release rate of 2% or less, and
- wherein the moisture absorbent includes:
- (A) 10 to 70 wt % of one or more hygroscopic materials selected from the group consisting of magnesium chloride, calcium chloride, and sodium carbonate;
- (B) 10 to 50 wt % of a curable inorganic substance comprising at least one or more selected from the group consisting of magnesium oxide and calcium oxide;
- (C) 5 wt % to 50 wt % of a polymer wax;
- and
- (D) an alkali metal phosphate salt included at 1 to 30 parts by weight, based on 100 parts by weight of the moisture absorbent.
7 more elements
Dependencies are inferred from the claim text.