[in Japanese]

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This is to survey the actual use of bedding with 2295 Korean housewives in 9 cities as the subjects of investigation for the purpose of both improving sleeping life of consumer and asking adequate commodity design in accordance with the demand of producer.
The results of the study are as follows : The important points to be considered for purchasing bedding are air permeability, humidity absorption and thermal insulation. It means that the cosumers regard the function of the product as important, but thermal insulation, air permeability, compres-sibility and heaviness cause dissatisfaction from the use of bedding.
Most of subjects enjoy their sleeping life by using traditional cotton quilt, but many of them hope to purchase silk, wool and down/feather quilt, And the main sleeping life of the consumer is of korean style, while that of younger generation changes gradually into western one, showing their individuality and variety.
The use of heater and air conditioner in the bedroom means the relative lowering the rate of attaching the importance to the function of bedding.
And also, this study shows a similar trend towards the importance and dissatisfaction of bedding, and the perception of the bedding of younger generation between both in Korea and in Japan.

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‘Wearing pressure’, which is caused by the garment restraint on the human body, can be related to the curvatures of the human body and biaxial extension properties of clothing materials. In this study, in order to propose a convenient method predicting the pressure in wear, the linearizing method is used for the estimation of the fabric tensions in the wale and course directions under biaxial deformations. In the linearizing method, the stress-strain relation of fabrics is firstly linearized using a transformed strain, and then expressed by a linear equation.
As an example, the ‘wearing pressure’ of four types of panty hose is calculated. Validity of the method is inspected with a subjective test of the fitness. The correlation coefficient between the calculated values of the pressure and results of the subjective test is high (>0.8) .

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As a part of a series of studies on effects of Bromine (Br) and Phosphorus (P) on the flame retardancy of PET fibers, this paper is focused on the thermal analytical observations of PET fabric treated with Br and P compounds in comparison with the untreated PET fabric to see how the effects of Br and P as well as of the combination of both elements will be reflected in the thermal analytical behaviors in the process of the thermal decomposition of PET fibers.
The results are summarized as follows: Glass transition temperature (Tg), crystallization temperature (Tc) and melting point of crystallized polymer (Tm₂) showed considerable reductions with increase in Br and P contents. Especially, larger reductions were observed with those having the synergistic effect. Comparing such relationship of the depression of Tg, Tc and Tm₂ to Br and P contents with that observed between increase in the LOI values and Br and P contents described in the previous paper, such tendency that the higher is the content of Br, P or Br+P, the larger the depression of Tg, Tc and Tm₂ and the higher the LOI value was observed for each sample. The addition of Br, P and the both to PET fabric further showed significant effects on the heats of crystallization and melting of the crystallized polymer. On the other hand, TG curves gave some informations concerning effects of Br, P and combination of the both on the thermal decomposition behaviors of PET fibers, i.e., considerable changes were observed for the thermal degradation onset temperature with incorporation of Br and/or P. Amounts of residues obtained after the thermal decomposition increased by addition of Br or P and even more in combination of the both showing the synergistic effect. In conclusion, the results obtained from the thermal analytical observations carried out this time suggest that Br and P applied chemically on PET fabric were sufficiently incorporated in the PET molecules by thermofix and participate in glass transition, crystallization and melting of crystallized PET polymer. Moreover, the synergistic effect of Br and P is reflected in the thermal properties as well as in the thermal degradation behavior.
The above results lead us to deduce that not only P but Br known as a radical terminator in the gas phase acts also in the solid phase to contribute to the flame retardancy of PET fibers.

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