JPH0230712B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a feather-like filling material for blow-in use that uses thermoplastic synthetic fibers and has excellent bulk and a unique feel. In general, products using filling materials include futons, quilting products, and other cushions, but the characteristics required of these products are a flexible texture and bulkiness, and these are particularly strong requirements for futons. be done. Among the conventional filling materials, waterfowl feathers are one of the most excellent materials in terms of the above characteristics.
It is well known that the feathers used in down comforters are mixed at a ratio of 50 to 70% down and 50 to 30% small feathers, and are supplied to the comforter through a blowing device.
Feather comforters made in this way have been prized since ancient times for their bulkiness, heat retention, moisture absorption and dissipation properties, and excellent instant recovery properties. However, since this material is naturally produced and is limited in quantity, it is expensive, and the current situation is that it is not generally used in large quantities. Utility Model 55-31021, in which a range of fineness, number of crimp, and degree of crimp was selected for thermoplastic synthetic fiber as a substitute for feathers.
No. 53-90421 has been developed, in which polyester fibers having a horseshoe-shaped cross-section are coated with a silicone finishing agent and an antistatic agent. However, these filling materials have the disadvantage that the fibers are highly entangled, so that they tend to form lumps during blowing, causing cotton clogging. Therefore, unless it is processed into a sheet by forcibly arranging the fibers through a carding process, it cannot be used as futon cotton, and has the disadvantage that it is significantly inferior to feathers in texture and bulk. The present invention provides a feather-like filling material that can be easily blown onto the futon side without using a carding process, and has a soft texture and bulk similar to feathers. That is, the present invention provides a filling material using staple fibers made of thermoplastic synthetic fibers, wherein the staple fibers (a) are made of composite fibers and are composed of a crimped part and a non-crimped part. , and (b) 80 to 20% of staple fibers with a single yarn fineness of 4 to 20 d, and (b) 20 to 80% of crimped staple fibers with a single yarn fineness of 3 d or less, and with the staple fiber (a) as a core. This is a feather-like filling material, which is characterized by being surrounded by staple fibers (b) in the form of loose filaments. The present invention is a filling material using staple fibers made of thermoplastic synthetic fibers, and includes two types of staple fibers: thick staple fibers equivalent to feathers and fine staple fibers equivalent to down.
It is a mixture of different types at different blending ratios depending on the purpose. A staple fiber corresponding to a feather is made of a composite fiber as shown in FIG. 1, and is composed of a crimped portion 17 and a non-crimped portion 16. The reason why composite fibers are used as staple fibers corresponding to feathers is that it is advantageous to produce staple fibers that are composed of crimped portions and non-crimped portions. A staple fiber composed of a crimped part and a non-crimped part is produced by drawing a composite undrawn yarn, then intermittently heat-treating the drawn yarn, and then subjecting it to crimp development treatment and cutting it into a predetermined length. It is obtained by In addition, staple fibers corresponding to feathers are composed of crimped parts and non-crimped parts, but if all the length is crimped, the fibers will become too entangled, and the fibers will become too entangled. This is because when the cotton material is blown onto the side of the futon, etc., it becomes clumpy and causes cotton clogging, and the feel is significantly inferior to that of feathers. That is, by using a staple fiber composed of a crimped part and a non-crimped part, it is possible to obtain a filling material that has a good feel and appropriate intertwining properties. In a staple fiber consisting of a crimped part and a non-crimped part, the length (a) of the crimped part is 2 to 30 mm, and the length of the non-crimped part is 2 to 30 mm.
(b) is preferably in the range of 30 to 2 mm, and the ratio (a/b) is preferably in the range of 0.07 to 15. If the length (a) of the crimped portion is less than 2 mm, the entangling force will be weak and, as will be described later, it will be difficult to entangle with staple fibers corresponding to down, which is not preferable. In addition, if the length (a) of the crimped portion exceeds 30 mm, the entangling property is too strong and the staple fibers corresponding to feathers become entangled with each other, making it difficult to mix with the staple fibers corresponding to down. Therefore, this is undesirable from the viewpoints of poor cotton sorting during blowing in the subsequent process, lack of uniform dispersion effect within the futon, and deterioration of the feel. In addition, the number of crimps in the crimped portion of the staple fiber corresponding to the feather is 6 to 20 crimps/25 mm, preferably 8 to 15 crimps/25 mm, and the degree of crimps is 15 to 40%, preferably 20 to 35%. It is desirable to do so from the viewpoint of entanglement. Furthermore, it is preferable to use hollow fibers as staple fibers, which correspond to feathers, as this provides an excellent effect in terms of bulkiness, and the degree of hollowness is 5 to 5.
It is preferable to set it to 30%. The single yarn fineness of the staple fiber, which corresponds to feathers, must be in the range of 4 to 20 d; if it is less than 4 d, the bulkiness will be poor, and if it exceeds 20 d, the texture will be poor. On the other hand, staple fibers corresponding to down are all crimped staple fibers, as shown in FIG. The staple fiber corresponding to down may be crimped by developing the latent crimping of a composite fiber, or may be mechanically crimped using a stuffing box or the like. The single yarn fineness of the staple fiber equivalent to down must be 3d or less, and the single yarn fineness is 3d or less.
If this value is exceeded, the feel of the resulting filling material will deteriorate, and the free separation of the staple fiber itself, which corresponds to down, will deteriorate, resulting in poor mixing with the staple fiber, which corresponds to feather, or when blowing. This causes cotton clogging, etc. In addition, the number of crimps of the staple fiber corresponding to down is preferably 4 to 15 crimps/25mm, and 4 crimps/25mm.
If it is less than 15 threads/25 mm, the entanglement property becomes too strong, which is not desirable. Further, the degree of crimp is preferably 5 to 15%; if it is less than 5%, the free separation property is poor, and if it exceeds 15%, it is undesirable in terms of entanglement property. The filling material of the present invention is a mixture of staple fibers equivalent to the above-mentioned feathers and staple fibers equivalent to down, and the mixing ratio is 80 to 20% staple fibers equivalent to feathers and 80 to 20% staple fibers equivalent to down. The staple fiber to be used is in the range of 20 to 80%. If the ratio of staple fibers equivalent to feathers exceeds 80%, the texture deteriorates and clogging occurs, and if the ratio of staple fibers equivalent to down exceeds 80%, bulkiness deteriorates. In this way, two types of staple fibers, consisting of a crimped part and a non-crimped part, a thick staple fiber and a fine staple fiber, are heated under high-speed air flow at a ratio of 80:20 to 20:80. By mixing, as shown in Figure 3,
A staple fiber A, which corresponds to a feather, is the core, and the staple fiber B, which corresponds to down, which has become loosely divided, covers the core, forming a cocoon-like separate and independent aggregate having flexibility and bulk. . The outer envelope of this aggregate is covered with staple fibers, which correspond to down with weak entanglement properties, so the entanglement force between each aggregate is weak, and it can easily be inserted into the futon side, etc., without passing through a card machine. It is possible to obtain a filling material that can be blown by air, has a remarkable effect on texture and bulkiness, and has properties similar to feathers. Note that it is desirable to apply a silicone-based finishing agent or the like to the two types of staple fibers. Next, a method of mixing staple fibers corresponding to feathers and staple fibers corresponding to down will be explained with reference to FIG. 4, which shows a specific example of a mixer. Put the two types of staple fibers of fiber B into storage chambers 1 and 2, respectively, and damper 4,
5 into the mixing molding silo 3, the dampers 4 and 5 are closed, the air vent valve 14 is opened, and the two types of staple fibers are mixed by the air flow sent from the blower 11 (for about 10 minutes). Thereafter, by opening the damper 6, closing the air vent valve 14, and blowing air from the blower 10, a cocoon-like aggregate having flexibility and bulk as shown in FIG. 3 is obtained from the product transport pipe 15. Example Polyester with an intrinsic viscosity of 0.65 and 0.60 measured in a mixed solvent of equal weight of phenol/tetrachloroethane at 20°C was spun at a side-by-side type with a discharge ratio of 1:1, with a discharge rate of 430 g/min, weight, and a spinning temperature of 280°C. Melt-spun at a speed of 900 m/min through a 200-hole hollow spinning nozzle, the undrawn yarn bundle of 25 spindles was drawn at a drawing temperature of 80°C and a drawing ratio of 4.5, and further stretched at a tension of 2 mg/d or more at 215 After closely passing through a gear with a contact length of 10 mm between teeth and tow heated to ℃, a 1% aqueous emulsion consisting of dimethylpolysiloxane, an aminosilane compound, and a metal salt was applied to the fiber, and the fiber was allowed to relax at 150℃ for 10 minutes. After being heat-treated to develop crimp, it was cut to a length of 32 mm. A staple fiber corresponding to a feather was obtained. The hollowness of this staple fiber is 15%. On the other hand, polyesters with intrinsic viscosities of 0.65 and 0.60 were used in a side-by-side type with a discharge ratio of 1:1, with a discharge amount of 250.
g/min, weight, spinning temperature 280℃, spinning speed 900m/
The undrawn bundle of 1,250,000 denier was drawn at a drawing temperature of 80°C and a drawing ratio of 4.5, and then an aqueous emulsion with a concentration of 1% consisting of dimethylpolysiloxane, an aminosilane compound, and a metal salt was added. The fibers were applied and heat treated at 150° C. for 10 minutes in a relaxed state to develop crimp, and then cut to a length of 32 mm to obtain staple fibers equivalent to down. The mixing ratio of the staple corresponding to the feather and the staple corresponding to the down was changed as shown in Table 1. The two types of staple fibers produced as described above were mixed using the mixer shown in Figure 4,
The filling material was obtained. Table 1 shows the results of measuring the characteristic values of the obtained filling material. Further, as a comparative example, when the mixing ratio of staple fibers corresponding to feathers and staple fibers corresponding to down and the fineness of both were changed to values outside the range specified in the present invention, the crimping of staple fibers corresponding to feathers was further reduced. Table 2 shows the cases where the ratio of parts was changed.

【table】

[Table] Notes 1, 2, and 3 are the same as Table 1.
The characteristic values used in the product of the present invention were determined as follows. The crimp performance was determined by a staple fiber corresponding to a feather consisting of a crimped part and a non-crimped part, and the sample for crimp performance measurement was produced without contacting the thermal gear. Applying an initial load of 2 mg/d to this sample, measure the length I ₀ and the number of crimp n, then measure the length I ₁ with a load of 50 mg/D,
Calculate the number of crimp C _o and degree of crimp C ₁ between 25 mm. Cn=n×25/I ₀ , C ₁ =(I ₁ −I ₀ )×100/I ₁ Furthermore, the number of crimp CN and degree of crimp CI of the staple fiber corresponding to the feather are determined. CN = Cn × [(Fiber length - Length of the part where crimps have disappeared) / Fiber length] CI = C ₁ × [(Fiber length - Length of the part where crimps have disappeared) / Fiber length] The bulk performance is The sample consists of specific volume at initial load (cc/g), B specific volume at load (cc/g), and compression ratio (%).
The height H ₁ (cm) after blowing 40 g into a 20 cm x 20 cm cushion bag and applying a load of 0.2 g/cm ² is determined. Specific volume at initial load = 20 x 20 x H ₁ /40 (cc/g) B specific volume at load is the same as the initial load specific volume measurement
12.5g/cm ² It is determined from the height h ₂ (cm) after loading. B specific volume when loaded = 20 x 20 x h ₂ /40 (cc/g) The compression ratio is as follows: 40 g of sample is placed in a 20 cm x 20 cm cushion bag, and the height after a load of 0.2 g/cm ² is H ₁ (cm). , then divide and load several times with a load of 12.5g/cm ² , repeat the loading, remove the load of 12.5g/cm ² , and
The specific volumes VH ₁ and VH ₂ are determined from the height H ₂ (cm) when a load of g/cm ² is applied, and the compressibility is determined from the formula below. Compression ratio = (VH ₁ - VH ₂ ) x 100 / VH ₁ (%) Blowing performance was determined by blowing 1.4 kg of sample into the futon side (210 cm x 150 cm) using a blowing device, and checking for cotton clogging, flexibility,
The dispersibility was tested.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a staple fiber corresponding to a feather, Fig. 2 is a schematic diagram of a staple fiber corresponding to down, Fig. 3 is a schematic diagram of the feather-like filling material of the present invention, and Fig. 4 is a schematic diagram of a feather-like filling material. FIG. 2 is a schematic diagram showing a specific example of a mixer for a corresponding staple fiber and a staple fiber corresponding to down. A: Staple fibers equivalent to feathers, B: Staple fibers equivalent to down, 1, 2: Storage chamber, 3: Mixed molding silo, 4,
5, 6: Damper, 7: Air vent pipe, 8, 9: Air blower pipe, 10, 11: Air blower, 12: Punching plate, 13: Filter, 14: Open/close valve,
15: Product transport pipe.

Claims (1)

[Scope of Claims] 1. A filling material using staple fibers made of thermoplastic synthetic fibers, wherein the staple fibers (a) are made of composite fibers and are composed of a crimped part and a non-crimped part. , and 80 to 20% of staple fibers with a single yarn fineness of 4 to 20 d.
(B) The staple fiber (B) is composed of 20 to 80% crimped staple fibers with a single yarn fineness of 3d or less, and the staple fiber (B) is formed into loose filaments around the core of the staple fiber (A). A feather-like filling material characterized by being covered. 2 Length of the crimped part of a staple fiber that is composed of a crimped part and a non-crimped part
The ratio (a/b) of (a) and the length of the non-crimped part (b) is
The feather-like filling material according to claim 1, which has a weight of 0.07 to 15.