JPH0434435B2 - - Google Patents

Description

[Detailed description of the invention]

<Industrial Application Field> The present invention relates to a padding article useful for bedding, furniture, vehicles, etc. <Prior Art> Conventionally, various filling objects have been proposed for the purpose of improving bulkiness, resistance to settling, soft texture, cotton processing properties, and the like. For example, as a filling material that does not feel bottomed out or sag, ``a core-sheath type synthetic fiber crimped fiber composed of a high melting point polymer as a core and a low melting point polymer as a sheath is mixed with other crimped synthetic fibers. A three-dimensional mesh fiber structure in which fibers are bonded to each other at the intersection points of the fibers is obtained by heating and integrating, and the futon cotton is made by overlapping arbitrary synthetic fiber cotton on the top and bottom of the structure, and the futon cotton is stored inside the futon side. ``Futon'' (Publication No. 54829 of 1983) has been proposed. In addition, for the purpose of improving soft texture and cotton processing properties, we have developed synthetic fiber staples coated with silicone resin that have a wetting rate of 25% or less on the cotton carding machine spinning machine. Synthetic fiber staples to which no silicone resin has been applied and whose web shrinkage rate is 30% or less are combined so that the shrinkage rate difference is 5% or more, and the weight ratio is in the range of 15:85 to 85:15. ``Blended cotton stuffing material'' (Utility Model Publication No. 53-5353) is disclosed. However, even in these stuffed objects, bulkiness, resistance to settling, shape stability, soft feel, elastic recovery, cotton processing properties, etc., have not all reached satisfactory levels. <Object of the Invention> The object of the present invention is to provide a filling object that satisfies all of these characteristics, that is, a filling object that has a luxurious feel. <Structure of the Invention> In other words, the present invention consists of a crimped synthetic fiber staple to which silicone resin has been applied (A fiber), a crimped synthetic fiber staple to which no silicone resin has been applied (B fiber), a core made of a high melting point polymer and a low It is a stuffed body made by blending core-sheath type crimped synthetic fiber staples (C fibers) with a sheath of a melting point polymer, in which the A fibers are not substantially combined with other fibers, and the B fibers and C fibers are mixed together. The fibers are mutually bonded, and the A-fibers have a lower fineness than the B-fibers. The synthetic fibers used in the present invention are, for example, fibers made of polyester, polyacrylonitrile, or polyolefin polymers. The crimp is a spiral crimp using composite fibers or
Use zigzag crimp, etc. using the push crimp method.
The number of crimps is preferably in the range of 5 to 15 crimps/inch. The cross section of the crimped synthetic fiber is not particularly limited, but a hollow circular cross section is preferred for any of the A, B, and C fibers. The single yarn fineness of each of the A, B, and C fibers is preferably in the range of 3 to 50 deniers. If it exceeds 50 denier, the adhesion efficiency decreases, the bond between fibers becomes insufficient, and the filler becomes rough and hard. If it is less than 3 denier, it becomes too flexible and the load support (compressive stress) becomes insufficient for practical use. The fineness of the A fibers must be lower than that of the B fibers. Preferably, the fineness is equivalent to 70% or less of B fibers. The blending ratio of each fiber A, B, and C is preferably in the range of 10 to 30% by weight of A fiber, 30 to 80% by weight of B fiber, and 10 to 60% by weight of C fiber. The B fibers are mutually bonded to the C fibers at fiber intersections to form a three-dimensional network structure. To form a three-dimensional network structure, A, B, C. Heat treatment is performed on the blended cotton made of each fiber, or pressure treatment is performed after or together with heat treatment. At this time, treatment conditions are appropriately selected so that the A fibers coated with silicone resin do not substantially bond with the B fibers or the C fibers. Under such conditions, the A fibers do not substantially bond with other fibers due to the effect of the silicone resin coating the fiber surfaces. "Substantially" means to include bonding to the extent that it is easily separated during use as a filler. The melting point range of low melting point polymers is 90~180℃ The melting point range of high melting point polymers is 150~300℃
A range of 0.degree. C. is preferred. The melting point of the B fiber is preferably between the melting point of the high melting point polymer and the melting point of the low melting point polymer used for the C fiber. The melting point of the A fiber is preferably higher than the melting point of the high melting point polymer. The heat treatment conditions preferably range from a temperature of 100 to 200°C and a time of about 30 to 300 seconds. When performing heat and pressure treatment, the temperature is 100 to 200℃ and the pressure is
The preferred range is 0.1 to 5 Kg/cm ² and the time is about 30 to 30 seconds. <Effects of the Invention> The present invention has the following effects. (1) By blending A, B, and C fibers and making the A fibers, which have a low coefficient of friction between fibers, exist in a non-hugged state within the stuffing, it has a moderate soft feel, elastic recovery, and high-class quality. give a feel. (2) Load support (so-called “bottoming”) is achieved by creating a network structure that combines B fibers and C fibers.
), has excellent resistance to settling and morphological stability. <Example> The method for manufacturing the filling object of the present invention will be described below with reference to Examples. The evaluations in the examples were conducted using a constant speed compression tester according to the following method. Sample Width 40cm x Length 40cm, 3 pieces each Compression area 20cm ² (circular) Compression speed 100cm/min After applying an initial load of 2g/cm ² and measuring the thickness (T ₀ mm),
Compress to a stress of 200g/cm ² and measure the thickness (T ₁ mm). Subsequently, the weight was removed at a constant speed and the thickness (T ₂ mm) was measured at a stress of 2 g/cm ² . Next, apply 80g/g to this sample for 15 seconds at 5 second intervals.
A load of cm ² is applied repeatedly 120 times. After this, the thickness (T ₃ mm) was measured by applying an initial load of 2 g/cm ² again using the compression tester, and the flexibility and
Calculate elastic recovery and set resistance. Flexibility (%) = {(T ₀ − T ₁ )/T ₀ }×100 Elastic recovery (%) = {(T ₂ − T ₁ )/(T ₀ − T ₁ )}×100 Resistance to set ( %) = (T ₃ /T ₀ )
Co., Ltd.) with 0.17% owf attached, 5.5 denier fiber length 76 mm, 8 crimps/inch, round cross section polyethylene terephthalate fiber (A fiber) with a crimp rate of 13%.
Fineness: 12 denier Fiber length: 51mm Number of crimps: 11 crimps/inch Hollow round cross-section polyethylene terephthalate fiber (B fiber) with crimp rate of 21% and hollowness rate of 23%, normal polyethylene terephthalate is used as the core component and isophthalic acid is copolymerized. Core-sheath type crimped polyester fiber (C fiber) made of copolymerized polyester with a melting point of 110℃ as a sheath component at a weight ratio of 50:50, with a fineness of 4 denier, a fiber length of 51 mm, a number of crimps of 7 strands/inch, and a crimp degree of 15%. A:
B:C was mixed at a weight ratio of 40:40:20. The cotton was opened with a hopper feeder, opened with a roller card, and cross-layered to form a web with a basis weight of 1 Kg/m ² . Then, the webbing was heated to a thickness of 35mm and a temperature of 145℃.
Heat treatment was performed for a treatment time of 90 seconds to obtain a filled object of the present invention. The properties of the obtained filling are shown in Table 1. Examples 2 to 3 Filled objects were obtained in the same manner as in Example 1 except for the conditions shown in Table 1. Table 1 shows the physical properties of the obtained stuffed body. Comparative Example 1 A stuffed body was obtained in the same manner as in Example 1, except that the A fibers were not mixed and the B fibers and C fibers were mixed in the proportions shown in Table 1. The physical properties of the obtained stuffed object are
Shown in the table. Comparative Examples 2 to 3 Comparative Examples 2 and 3 were carried out in the same manner as in Examples 2 and 3, respectively, except that the A fibers were not mixed and the B fibers and C fibers were mixed in the proportions shown in Table 1. A filling object was obtained. Table 1 shows the physical properties of the obtained stuffed body.

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Claims (1)

[Claims] 1 Crimped synthetic fiber staples to which silicone resin has been applied (A fiber), crimped synthetic fiber staples to which silicone resin has not been applied (B fibers), core-sheath having a core made of a high melting point polymer and a sheath made of a low melting point polymer. It is a stuffed body made of a blend of crimped synthetic fiber staples (C fibers), in which the A fibers are not substantially bonded to other fibers, the B fibers and C fibers are mutually bonded, and the A fibers are not substantially bonded to other fibers. A stuffed object characterized in that the fineness of the fibers is lower than that of B fibers.