The flammability of beddings, especially of waddings of bed clothes, were investigated, first, by measuring the temperatures of burning weddings, and next, by testing the flammability by the Methenamine method.
1) The ascending curves of the temperatures in flaming on the three points of waddings piled up six layers, show that they are divided into two groups by the thermal property, i.e., the first group includes cotton, cotton/modacryl, and cotton/polyester blended fibers, and the second group includes polyester and modacryl fibers. Among these fibers, cotton/modacryl blended fibers are low in coefficient of heat transfer.
2) The tests by the Methenamine method at 45 degrees show that the flammability of waddings of bedclothes is remarkably influenced by that of covering fabrics of waddings. Modacryl fibers are rather easier to inflame owing to the space between the waddings and covering fabrics.
3) The flammability of wadded bedclothes can be suppressed, irrespective of the kind of wadding fibers, by using the resistant-to-flame covering fabrics.

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The liberation of formaldehyde from fabrics finished with non-and less-formalin type resins was studied under various condituons in comparison with that from fabrics finished with urea, melamine and monourein glyoxal resins reported in the previous papers. Liberation from fabrics finished with a non-formalin type resin was negligible and HCHO liberated from fabrics especially regenerated cellulose fabrics finished with less-formalin type resins was higher.
Liberated HCHO shows an increase with ageing up to 4 weeks after preparation or washing, reaching an equibilium level in general, while an insufficient curing gave a continual increase thereafter.
Liberated HCHO and HCHO concentration were alse observed on the simulated skin surface under a specially deviced condition, which showed markedly lower levels than those observed by JIS method extracting HCHO in a liquid phase. Some of less-formalin types, however gave considerably high levels exceeding the regulated value (75μg/g sample) 30 minutes after the initiation of contact between the skin surface and the fabrics.

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