US 4,681,791 AGranted

Thermochromic textile material

AssigneeThe Pilot Ink Co., Ltd.

InventorsYutaka Shibahashi, Norikazu Nakasuji, Takashi Kataoka, Hiroshi Inagaki, Tutomu Kito, Masaharu Ozaki, Nobuaki Matunami, Naoya Ishimura, Katuyuki Fujita

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Abstract

A textile material in the form of fiber, raw stock, yarn or fabric, which comprises fibers each of which is coated with a thermochromic layer containing a thermochromic pigment having a particle size satisfying the formula: ##EQU1## wherein r represents a particle size of a pigment; D represents fineness (denier) of a fiber; and d represents a density (g/cm.sup.3) of a fiber. The textile material can undergo reversible color change in a wide variety of colors and can be applied to any kind of textile products.

Claims10

Dependent claims

A thermochromic textile materaial comprising a textile material composed of a plurality of fibers coated with a thermochromic layer containing a binder and a thermochromic pigment comprising an electron-donative, color former, an electron-accepting developer and a color-changeable controlling agent, wherein each of the fibers is coated with the thermochromic layer containing the thermochromic pigment having a particle size satisfying the formula:

0.01.ltoreq.r.ltoreq.10.sqroot.D/d
wherein r represents the particle size of the pigment in .mu.m;
D represents the fineness of the fiber in denier;
and d represents the density of the fibers in g/cm.sup.3, in which said thermochromic layer is coated to a coverage of from 3 to 90% by weight based on the fibers on a dry basis, and said composition is present in an amount of from 5 to 80% by weight based on the thermochromic layer on a dry basis.

1 more element

Dependencies are inferred from the claim text.