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US 4,046,504 AGranted
Process for preparation of colored suede sheet materials
AssigneeKuraray Co., Ltd.
InventorOsamu Fukushima
Life of this patent
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Abstract
In a process for preparing suede sheet materials having desirable tactile characteristics and good coloring, fibers are colored with a dope dye before being formed into a fibrous mat. The mat is impregnated with a binder and subsequently treated to produce a sheet material having a napped surface. The sheet material is then dyed to obtain the product.
Claims11
A process of preparing suede sheet materials having desirable tactile characteristics and good coloring comprising the steps of:
- a. coloring fibers throughout with dope dyes;
- b. forming said colored fibers into a fibrous mat;
- c. impregnating said mat with a binder composed mainly of an elastomer;
- d. treating said impregnated mat to form a napped surface thereon, the size of the fibers in the resulting nap ranging from 0.1 to 0.0005 denier;
- and
- e. dyeing the napped sheet material.
3 more elements
A process for preparing suede sheet materials having desirable tactile characteristics and good coloring which comprises the steps of:
- a. forming a fibrous mat from mixed fibers in which a polymer (component A) containing 0.5 to 15% by weight, based on the polymer, of a dope dyes is dispersed in the form of a plurality of fine denier fibers in a polymer (component B) having a solvent solubility different from that of the polymer component A;
- b. impregnating the fibrous mat with a binder composed mainly of an elastomer;
- c. coagulating the impregnated fibrous mat;
- d. treating the fibrous mat with a solvent capable of dissolving the component B selectively to remove component B from the mixed fibers, to produce a binder-impregnated sheet material;
- e. forming a nap of fibers on the surface of said sheet material, and
- f. dyeing the napped sheet material.
3 more elements
Dependencies are inferred from the claim text.