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US 12,616,240 B2Granted
Double-layer seamless capsule containing water-soluble composition
AssigneeFuji Capsule Co., Ltd.
InventorsShoji Tachikawa, Miku Sasaki, Sergio Ishiba, Tsubasa Mochizuki, Taisuke Sano
Life of this patent
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Abstract
The present invention addresses the problem of providing a double-layer seamless soft capsule having a water-soluble composition as its fill, and by preparing a capsule shell from an ultraviolet-curing resin composition, a double-layer seamless capsule is made which consists of a capsule shell and a water-soluble composition as a fill and where volatility of the fill due to permeation through the shell is low.
Claims8
A cigarette filter comprising:
- a double-layer seamless capsule consisting of a capsule shell and water or a water-soluble composition as a fill,
- wherein the capsule shell is prepared by curing an ultraviolet-curing resin composition,
- the ultraviolet-curing resin composition is an acrylic resin composition or a silicone resin composition,
- the acrylic resin composition comprising an acrylic oligomer, an acrylic monomer, an acrylic acid and a photopolymerization initiator,
- a viscosity of the ultraviolet-curing resin composition is 20 to 2000 mPa·s, and
- wherein the seamless capsule has a mass decrease of less than 5% after stored at 20° C. for 60 days.
3 more elements
Dependencies are inferred from the claim text.