Abstract: An artificial hair fiber bundle comprising: a mixture of a synthetic acrylic base fiber (A) made of an acrylic base copolymer containing acrylonitrile, vinyl chloride and vinylidene chloride and a first vinyl monomer copolymerizable therewith, a synthetic acrylic base fiber (B) made of an acrylic base copolymer containing acrylonitrile, vinyl chloride and a second vinyl monomer copolymerizable therewith; a synthetic polyvinyl chloride base fiber having a monofilament fineness of 30 to 90 decitexes, provides a hair decorative product superior in stylability and sensory characteristics and favorable for use as a wig, hairpiece, or the like.

Abstract: Acrylic fiber which can be produced industrially at a low cost and has excellent appearance properties that the individual fibers are clearly perceived visually is provided. The object is attained by using an acrylic fiber comprising an acrylic copolymer, which has a light transmittance of 15 to 65% in the fiber width direction and a maximum surface reflectance of 30 to 80% with respect to light incident thereon at an angle of 60 degrees in the fiber length direction, wherein the fiber contains 1.2 to 30 parts by weight of white pigment having a maximum particle size of at most 0.8 ?m based on 100 parts by weight of the acrylic copolymer.

Abstract: An artificial hair fiber bundle comprising: a mixture of a synthetic acrylic base fiber (A) made of an acrylic base copolymer containing acrylonitrile, vinyl chloride and vinylidene chloride and a vinyl monomer copolymerizable therewith, a synthetic acrylic base fiber (B) made of an acrylic base copolymer containing acrylonitrile, vinyl chloride and a vinyl monomer copolymerizable therewith; and a synthetic polyvinyl chloride base fiber having a monofilament fineness of 30 to 90 decitexes, provides a hair decorative product superior in stylability and sensory characteristics and favorable for use as a wig, hairpiece, or the like.

Abstract: Porous acrylic fibers produced by a method comprising subjecting a spinning dope containing 0.3 to 20 parts by weight of poly(vinyl acetate) relative to 100 parts of an acrylic copolymer to a wet spinning to give fibers, crimping and cutting the fibers, subjecting the resultant fibers to a treatment by hot water at 90 to 100° C. for 30 to 120 minutes or by saturated steam at 90 to 130° C. for 10 to 90 minutes to thereby form porous fibers; and a pile fabric having pile portions which comprise the porous fibers in an amount of 3 wt % or more, and, in the pile fabric, respective single fibers are visible being separate and emphasized, and thus the pile fabric has an appearance being highly decorative and excellent in design characteristics.

Abstract: Acrylic fiber which can be produced industrially at a low cost and has excellent appearance properties that the individual fibers are clearly perceived visually is provided.

Abstract: A hollow shrinkable fiber is manufactured by wet spinning a copolymer of acrylonitrile and a halogen-containing vinyl monomer, and then carrying out steam treatment, followed by drying treatment, and then heat treatment, thus forming a marrow-like or network-like hollow portion comprising a large number of voids in a core part of the fiber cross section. The void ratio of the fiber cross section is 10 to 50%, and the dry heat shrinkage percentage of the fiber is at least 15%. The fiber has a hollow form similar to that of natural fur, is excellent in terms of bulkiness, a lightweight feeling and warmth retention, and can be used as down hairs in pile products.

Abstract: A pile product, wherein shrinkable staple fibers and non-shrinkable staple fibers are mixed to prepare a sliver, and the sliver is subjected to pile-processing to constitute a pile portion. The sliver contains 20 to 98% by weight of the shrinkable staple fiber having a shrinkage percentage of 15% or more, 0.300 or less of statical friction coefficient between fiber-fiber after shrinkage, an average fiber length of 15 to 25 mm, and larger waves, including primary crimps, of 1 to 3/inch, and has a sliver strength of 3 g/g/m or more. The shrinkable staple fiber preferably has an organopolysiloxane deposited on the surface thereof. The sliver is subjected to pile-processing to constitute a pile portion. Operating property is good in spinning fibers which constitute a pile portion, and fiber loss in pile-processing is less. The pile product is excellent in a drape property, and has an appearance- and a feeling, very similar to those of a natural fur.

Abstract: The present invention provides a synthetic fiber to be used for pile products having an appearance and texture near to natural fur, to which a softening agent is adhered, the fiber being obtainable by controlling the adhered amount of an emulsifier to 8 parts by weight or less relative to 100 parts by weight of a softening compound in the softening agent adhered to the synthetic fiber, and the fiber overcoming an insufficient slimy feeling and having a further lowered &mgr;s (F/F) and an improved sliminess. The invention also provides a process for producing the same.

Abstract: A hollow shrinkable fiber is manufactured by wet spinning a copolymer of acrylonitrile and a halogen-containing vinyl monomer, and then carrying out steam treatment, followed by drying treatment, and then heat treatment, thus forming a marrow-like or network-like hollow portion comprising a large number of voids in a core part of the fiber cross section. The void ratio of the fiber cross section is 10 to 50%, and the dry heat shrinkage percentage of the fiber is at least 15%. The fiber has a hollow form similar to that of natural fur, is excellent in terms of bulkiness, a lightweight feeling and warmth retention, and can be used as down hairs in pile products.

Abstract: A synthetic fiber of acrylic series having an excellent animal-hair feeling is provided. The surface of the fiber having unevenness, in which the center-line mean roughness of the outer periphery of the cross-section of the fiber lies within a range of 0.01 to 0.13 .mu.m, is adhered thereon with an organopolysiloxane, wherein an effect by a treatment with silicone may be obtained to a greatest extent to provide the fiber having an extremely excellent animal-hair feeling. The kinds and amounts of additives to be added to a spinning solution may be so controlled that the roughness of unevenness on the surface of the fiber lies within the above range, thereby the appearance of the fiber with or without gloss may be selected. When the roughness of the surface unevenness lies within the above range and the cross-section of the fiber is a circle, or a flat or oval section having an aspect radio of 10 or less, a fiber having an extremely excellent animal-hair feeling may be obtained.

Abstract: Novel immobilized cells are prepared by immobilizing microbial cells in a gel carrier wherein an absorbent for organic solvents harmful to the cells is dispersed. A method for normally culturing these immobilized cells is utilized in a medium that contains the organic solvents or to which organic solvents are added without any previous sterilization. The present invention makes it possible to realize an ideal fermentation process without requiring a sterilizing process.

Abstract: An electromagnetic wave shielding transparent body comprising one or more transparent sheets, a transparent conductive layer formed as a first electric conductor on at least one of said transparent sheets, and a second electric conductor separated from said transparent conductive layer.