JPS6052832B2 - Deformed cross-section crimped polyester fiber for stuffing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in crimped polyester fibers for stuffing to which a silicone resin is attached.

It is already well known to apply silicone resins to crimped polyester fibers to improve bulk, compressibility, compression recovery and hand, and to use this for stuffing purposes.

However, since the crimped polyester fibers obtained by adhering the silicone resin have improved slipperiness, when the fibers are used as stuffing in futons, the feel and texture of the stuffing may be affected. Although the compression characteristics are improved,
On the other hand, the fibers tend to come out from the sides of the futons, causing discoloration.

For this reason, in applications where the filling fibers do not come out from the sides of futons, the weave density of the side parts (fabric) used is extremely high and the size of the gap formed between the warp and weft is It was necessary to make it smaller. An object of the present invention is to provide silicone resin-treated crimped polyester fibers for stuffing which, when applied to stuffing for bedding, does not easily cause the fibers to come out of the side fabric.

The purpose of the present invention is to calculate the single yarn denier (D), the circumscribed circle diameter of the fiber cross section (φ microns), the value 10 from the single yarn denier, and the ratio of IID to the circumscribed circle diameter of the fiber cross section (φ microns).
/10.1/D) can be achieved by using a crimped polyester fiber with a modified cross section for stuffing, which satisfies the following conditions and has a silicone resin adhered to the fiber surface.

4D<, 12φ>36φ/10.1VD>1.3 The first characteristics of the crimped polyester fiber for stuffing according to the present invention are the fineness of the single yarns constituting the fibers and the fineness of the single yarns constituting the fibers. The reason is that the diameter of the circumscribed circle of the cross section of is set within a specific range.

The single yarn denier must be 4 to 1 bj neer,
5 to 1 degrees is more preferred.

If it is less than 4 denier, the compressive properties as a filling will decrease and the elasticity will be insufficient, and the φ described below is 36 microns or more,
Even if φ/10 and IID are 1.30 or more, it is not possible to prevent futons from falling through the sides.

Moreover, if it exceeds 12 denier, the stuffing will have a rough and hard feel when compressed, which is not preferable.

In addition, the circumscribed circle diameter φ of the fiber cross section specified below is 36
It needs to be at least 40 microns, more preferably at least 40 microns.

If it is less than 36 microns, it is not possible to prevent the fibers from coming off from the stuffed side fabric.

Here, the diameter of the circumscribed circle of the fiber cross section described above is determined as follows.

In other words, a cross-sectional section of the fiber is taken using a conventional method, and a negative image of this is magnified 200 times with an optical microscope is photographed, which is then enlarged 2.5 times and printed to obtain a positive image. . In the present invention, the circumscribed circle of the fiber cross section refers to the circle that touches at least two points on the outer periphery of the 50-square fiber cross-sectional image obtained by the above operation, and that is the closest circle that does not intersect with any part of the outer periphery. It refers to something with a small diameter, and it is expressed as the average value obtained by measuring graphically using the image 5.

FIGS. 1 and 2 show the cross-sectional shape of a preferred example of the polyester fiber according to the present invention, and in the figures φ indicates the diameter of the circumscribed circle of the fiber cross-section. The second characteristic of the crimped polyester fiber for stuffing according to the present invention is the 10.1! The deformed cross section is such that the ratio φ/10.11T5 of the value of the hill to the value of the circumscribed circle diameter φ microns of the fiber cross section is 1.30 or more, and more preferably 1.50 or more.

φ/10.1! If h is less than 1.30, many fibers will fall out from the side cloth when used as padding for bedding, and the object of the present invention cannot be achieved. That is, φ/10.1!
The fact that the hill is close to 1 means that the cross-sectional shape of the fibers is close to a perfect circle, and the more the fiber cross-sectional shape approaches a perfect circle, the more the fibers will come out from the side cloth.

On the other hand, φ/10.1! The fact that 5 moves away from 1 is tricky! The cross-sectional shape of the fiber moves away from a perfect circle. For example, in the case of a rectangular cross-section, φ/10.1! If (2) is large, the ratio of the length of the long side to the length of the short side will be large.

Polyester fiber according to the present invention, that is, single fiber D
For deformed cross-section crimped polyester fibers in which the ratio φ/10.1Ji5 of the value of 10.1Jfi obtained from obtained by doing.

That is, polyester is used in a specific shape of the cap, for example, a slit-shaped cap with a large ratio of the length of the slit to the width of the slit, a Y-shaped or T-shaped cap, a cross-shaped cap,
Melt spinning is carried out using spindles in the form of spindles or other modified shapes. In this case, the degree of polymerization of polyester, spinning temperature, discharge speed, etc. should be determined based on the target fiber cross-sectional shape and φ/10.
．． 1Ji5', various settings can be made within a commonly applicable range.

Next, the obtained undrawn yarn is bundled into a tow shape and subjected to ordinary stable drawing and post-processing conditions to form a crimped fiber. Furthermore, the polyester fiber of the present invention needs to have a silicone resin attached to the surface of the fiber in order to improve bulk retention properties, compression recovery properties, and flexibility as filler properties.

The method for attaching silicone resin to polyester fibers is a conventionally known method, namely, by continuously immersing undrawn yarn after melt spinning or straight drawn tow after drawing into a silicone resin treatment solution, or by using a nozzle. A method in which a silicone resin treatment liquid is continuously sprayed onto the tow, the excess treatment liquid is squeezed with a pair of rollers, etc., and the tow is crimped, followed by drying or heat treatment, and cut fibers of two drawn yarns are treated with silicone resin. After immersing the tow in a liquid, removing excess treatment liquid and drying or heat-treating the tow, the stretched tow is crimped using a push-in crimping device, and then the tow is crimped in the stuffing box of the device or stuffed. A method may be adopted in which the polyester crimped fiber is treated with a silicone resin treatment liquid immediately after passing through the box.

The silicone resin that can be used may be any organopolysiloxane that can form a cured film after being adhered to polyester fibers.

In particular, dimethylpolysiloxane with a hydroxyl group at the end,
Methylhydrodiene polysiloxane or a combination thereof is preferred. It can be used as an organopolysiloxane aqueous solution or as an emulsion with an emulsifier. In addition,
The amount of polyorganosiloxane attached to the fibers of the final product is 0.1 to 3. It is preferable that the amount is 1% by weight.

In addition, if an antistatic agent is mixed into the organopolysiloxane treatment solution or added after the organopolysiloxane treatment, the antistatic properties of the final fiber will be improved, making it easier to use when making stuffed cotton. This is preferable because static electricity problems are improved.

The polyester constituting the polyester fiber of the present invention is
From terephthalic acid or its lower alkyl derivative (diester of an alkanol having 1 to 4 carbon atoms) and ethylene glycol, or from terephthalic acid or its lower alkyl derivative and ethylene glycol and at least one other copolymer component, or from bis- A polyester obtained from 2-hydroxyethyl terephthalate or a low polymer thereof, or from bis-2-hydroxyethyl terephthalate and at least one other copolymer component, in which at least 70% of the polyester constituent units are polyethylene terephthalate. Further, the polyester fiber of the present invention may contain modifiers such as known pigments and flame retardants. The silicone resin-attached polyester fiber of the present invention is unique in that when it is used as a stuffing for futons, it can prevent the fibers from coming out from the side fabric, and it also has excellent compression recovery properties and bulk retention properties, making it useful as a stuffing. It is.

The present invention will be further explained in detail by giving examples below.

In addition, each characteristic in an Example was obtained by the following measuring method.

(a) Intrinsic viscosity: Measured at 25℃ in O-chlorophenol
Determined value (mouth) Diameter of circumscribed circle of single yarn cross section φ: Already described (c) Number of crimps (crest/25m) = (B/A) x
25 (d) Degree of crimp (%) = (C/A-1) x 100 where, A: Fiber when initial load 2m9/d is applied.
Fiber length (Ran) B: Length when initial load 2 mg/d is applied Number of crimps in length A C: Load 300
Fiber length when applying 1g/d (1m)
(e) Length of the short side of the rectangular gap formed between the warp and weft of the fabric used for the side cloth: Select w arbitrary parts of the side cloth fabric and magnify it 7.5 times using an optical microscope. It is enlarged, photographed, and then enlarged to 1@ when printing, and the final enlarged photo to 7 h is taken as 1U.

Using this photograph, measure the short sides of all 1 (1) gaps surrounded by 1 space in the vertical direction and 1 space in the lateral direction, centering on one space. This is 10! ! ! W. Return and measure the short sides of a total of 10 (1) gaps, and find the length of the short side O ~ 10 μ, 10 ~ 20
μ, 20-30μ, 30-40μ, 40-50μ, 50
〜60μ, 60〜70μ, 70〜80μ, 80〜卯μ,
Divide into 90-100μ and 100μ or more categories and find the corresponding number for each. Example 1 Polyethylene terephthalate with an intrinsic viscosity of 0.66 and a slit width of 0.1T! M1 slit length 0.7WR cap A
And slit width 0.1WI&, slit length 0.5?
Using a spindle B with a hole shape of Undrawn yarns were obtained by melt spinning at a discharge rate of 9 and 15 deniers.

A large number of the obtained undrawn yarns were bundled and drawn to 3 times the length by a conventional method to obtain a 3-denier straight tow.

This is pressed into a stuffing box at a speed of 100 WL per minute in a conventional manner to apply crimps, and commercially available organopolysiloxane After the treatment solution (consisting of -0H-terminated dimethylpolysiloxane and methyl-hydrogen polysiloxane) was applied to the fiber bundle, it was heated at 150'C x 20cm in a circulating hot air dryer.
Dry and cure for minutes. In this case, the treatment liquid was an aqueous emulsion containing 1.5% solid silicone at a rate of 990 cc per minute to impart 0.41% by weight silicone resin to the fibers.

64 processed fibers? After cutting, the fibers were thoroughly opened to take 20y, and the fibers were packed into 0x0 bags made of taffeta fabric made of polyester/cotton blend spun yarn to make a futon-like product.

This futon analogue was held between both hands and compressed for 5 minutes at a rate of about 60 times per minute, and then the amount of fibers that came out from the gaps between the fabric sides was observed.

The results are shown in Table 1. ) In addition, the number of rectangular gaps formed by the warp and weft of the taffeta fabric side cloth with a short side length of 40 microns or more is a gap of 1000 microns or more.
177 out of 11.

Comparative Example 1 Polyethylene terephthalate with an intrinsic viscosity of 0.66 was made into a polyethylene terephthalate with a pore diameter of 0.23TnI. Undrawn yarns with a circular cross section and the fineness shown in Table 2 were obtained using a spinneret at a spinning temperature of 290° C. and a spinning speed of 1300 WL/Min while changing the discharge amount. This was stretched in the same manner as in Example 1, coated with silicone resin, dried and cured, cut, and fully opened.

A futon analogue was made from this in the same manner as in Example 1, and after repeated compression, the amount of loose fibers from the side fabric was observed. The results were as shown in Table 2. Example 2 Polyethylene terephthalate with an intrinsic viscosity of 0.66 was slit with a width of 0.08? After spinning using a Y-shaped die consisting of three slits with a length of 0.511R, the single yarn fineness was 8 denier and the diameter of the circumscribed circle of the fiber cross section was φ according to the procedure of Example 1. 43.2 microns, φ/10.1JT
A drawn yarn with a ratio of 5 to 1.51 was obtained.

Thereafter, a silicone resin was applied according to the method of Example 1,
When we made a futon analogue and evaluated the amount of fiber shedding from the side fabric, we found that almost no shedding was observed.

[Brief explanation of drawings]

FIGS. 1 and 2 are cross-sectional views of preferred examples of the polyester fibers for stuffing of the present invention.

Claims (1)

[Claims] 1 Single yarn denier (D), circumscribed circle diameter of fiber cross section (φ
microns), the ratio of the value 10.1√D from the single yarn denier to the diameter of the circumscribed circle of the fiber cross section (φ/10.1√D) satisfies the following conditions, and the silicone resin is attached to the fiber surface. A crimped polyester fiber with a deformed cross section for stuffing. 4≦D≦12 φ>36 φ/10.1√D>1.30