Ultraviolet blocking acrylic fibers, ultraviolet blocking fabric and fiber product containing the same, and method for manufacturing the same
Ultraviolet blocking modacrylic fibers contain an anionic surfactant in an amount of 0.03 wt % or more. The ultraviolet protection factor (UPF) rating value of the ultraviolet blocking modacrylic fibers measured according to JIS L 1925: 2019 is UPF15 or more. Thus, ultraviolet blocking modacrylic fibers that are less likely to be discolored and have excellent ultraviolet blocking properties, an ultraviolet blocking fabric and a fiber product containing the ultraviolet blocking modacrylic fibers, and a method for manufacturing the ultraviolet blocking modacrylic fibers are provided.
1 . Ultraviolet blocking modacrylic fibers comprising
an anionic surfactant in an amount of 0.03 wt % or more and less than 0.15 wt %,
wherein an ultraviolet protection factor UPF rating value of the ultraviolet blocking modacrylic fibers measured according to JIS L 1925:2019 is UPF15 or more,
the anionic surfactant is a monoalkyl sulfate salt and an alkyl benzenesulfonate salt,
a content of the monoalkyl sulfate salt is 0.010 wt % or more and less than 0.142 wt %, and
a content of the alkyl benzenesulfonate salt is 0.008 wt % or more and less than 0.140 wt %.
2 . The ultraviolet blocking modacrylic fibers according to claim 1 , wherein the anionic surfactant is one or more selected from the group consisting of a monoalkyl sulfate salt, an alkyl polyoxyethylene sulfate salt, an alkyl benzenesulfonate salt, and an alkyl polyphenylene ether sulfonate salt.
3 . The ultraviolet blocking modacrylic fibers according to claim 1 , wherein the anionic surfactant includes a monoalkyl sulfate salt and an alkyl benzenesulfonate salt.
4 . The ultraviolet blocking modacrylic fibers according to claim 1 , wherein an ultraviolet blocking rate of the ultraviolet blocking modacrylic fibers measured according to JIS L 1925:
2019 is 90% or more.
5 . The ultraviolet blocking modacrylic fibers according to claim 1 , comprising an antimony compound in an amount of 1 wt % or more and 40 wt % or less.
6 . The ultraviolet blocking modacrylic fibers according to claim 1 , comprising a modacrylic polymer including:
acrylonitrile in an amount of 35 wt % or more and 85 wt % or less;
one or more halogen-containing monomers selected from the group consisting of a halogen- containing vinyl monomer and a halogen-containing vinylidene monomer in an amount of 15 wt % or more and 65 wt % or less; and
a sulfonic acid group-containing vinyl monomer in an amount of 0 wt % or more and 3 wt % or less.
7 . An ultraviolet blocking fabric comprising the ultraviolet blocking modacrylic fibers according to claim 1 in an amount of 40 wt % or more.
8 . A fiber product comprising the ultraviolet blocking fabric according to claim 7 .
9 . A method for manufacturing the ultraviolet blocking modacrylic fibers according to claim 1 , comprising a step of forming a modacrylic polymer by an emulsion polymerization method, wherein an emulsifier used in the emulsion polymerization method includes the anionic surfactant.
10 . The ultraviolet blocking fabric according to claim 7 , comprising the anionic surfactant in an amount of 0.03 wt % or more and less than 0.15 wt %.
11 . The ultraviolet blocking fabric according to claim 7 , comprising the anionic surfactant in an amount of 0.15 wt % or more, and an ultraviolet reflector in an amount of 0.5 wt % or more and 4 wt % or less and/or an ultraviolet absorber in an amount of 0.05 wt % or more and 2 wt % or less.
12 . The fiber product according to claim 8 , wherein the ultraviolet blocking modacrylic fibers comprise the anionic surfactant in an amount of 0.03 wt % or more and less than 0.15 wt %.
13 . The fiber product according to claim 8 , wherein the ultraviolet blocking modacrylic fibers comprise the anionic surfactant in an amount of 0.15 wt % or more, and an ultraviolet reflector in an amount of 0.5 wt % or more and 4 wt % or less and/or an ultraviolet absorber in an amount of 0.05 wt % or more and 2 wt % or less.
14 . The ultraviolet blocking modacrylic fibers according to claim 1 , wherein the monoalkyl sulfate salt is sodium lauryl sulfate and the alkyl benzenesulfonate salt is sodium benzeneoxy bis- tetrapropylene sulfonate.
15 . Ultraviolet blocking modacrylic fibers comprising:
an anionic surfactant in an amount of 0.15 wt % or more; and
an ultraviolet reflector in an amount of 0.5 wt % or more and 4 wt % or less and/or an ultraviolet absorber in an amount of 0.05 wt % or more and 2 wt % or less,
wherein an ultraviolet protection factor UPF rating value of the ultraviolet blocking modacrylic fibers measured according to JIS L 1925:2019 is UPF15 or more,
the anionic surfactant is a monoalkyl sulfate salt and an alkyl benzenesulfonate salt,
a content of the monoalkyl sulfate salt is 0.010 wt % or more and less than 0.142 wt %, and
a content of the alkyl benzenesulfonate salt is 0.008 wt % or more and less than 0.140 wt %.
16 . The ultraviolet blocking modacrylic fibers according to claim 15 , wherein
the monoalkyl sulfate salt is sodium lauryl sulfate and the alkyl benzenesulfonate salt is sodium benzeneoxy bis-tetrapropylene sulfonate,
a content of the sodium lauryl sulfate is 0.011 wt % or more and less than 0.141 wt %, and
a content of the sodium benzeneoxy bis-tetrapropylene sulfonate is 0.009 wt % or more and less than 0.139 wt %.