JP4502424B2 - Shortcut polyester fiber manufacturing method and flocky processing method using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a shortcut polyester fiber capable of obtaining a flocked product having an excellent appearance and texture, and a flocky processing method using the same.
[0002]
[Prior art]
Conventionally, a short cut fiber called a pile cut short with a cutter to about 3 mm or less is bonded so that the pile stands vertically on a substrate such as a woven or knitted fabric, non-woven fabric, wood, metal or plastic coated with an adhesive. There is a method called flocking that makes the texture and feel similar to velvet. The fiber used for piles is often used as rayon fiber because it is easy to cut and has good dyeability. Recently, nylon fiber is also used because of its good texture, and it is inexpensive and has good weather resistance. The use of fiber is also being considered. However, when polyester fibers are used, there is a problem that the texture becomes hard.
[0003]
Japanese Patent No. 2551837 discloses that a product having a special appearance and texture can be obtained by flocking a pile with a bend. However, there is a problem that it is difficult to perform a flocking process with a uniform surface form because piles with a bend are unlikely to fall apart one by one.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the current situation, and intends to provide a method for producing a polyester fiber having good processability by using it as a flocked processed product having a unique appearance and soft texture similar to suede type leather. To do.
[0005]
[Means for Solving the Problems]
The present invention achieves the above object, and the gist thereof is as follows. That is, the present invention is 170 free shrink heat treatment by 30 /2.5cm more spiral crimp (coil spring-like three-dimensional crimp) of the polyester fiber Jo Tokoro with latent wound Chijimino can express the ℃ Summary of manufacturing method of shortcut polyester fiber, characterized in that after cutting into a pile of cut length, the pile is stored in a container so that the pile does not move freely, and dyeing is performed without substantially developing spiral crimp. It is what. Further, the present invention is a pile of cut polyester fibers to a Jo Tokoro cut length of the pile with latent wound Chijimino can express 30 pieces /2.5cm more spiral crimps by free shrink heat treatment 170 ° C. In a state of being housed in a container so that it does not move freely, it is flocked using shortcut polyester fibers obtained by dyeing without substantially developing spiral crimps, and then heat-treated and crimped. The gist of the present invention is a flocky processing method using a shortcut polyester fiber characterized in that
[0006]
Hereinafter, the present invention will be described in detail.
In order to produce the polyester fiber which is the object of the present invention, first, a latent crimp capable of developing spiral crimps of 30 pieces / 2.5 cm or more, preferably 50 pieces / 2.5 cm or more by a free shrink heat treatment at 170 ° C. It is necessary to use a polyester fiber having a shrinkage capacity as a raw material. This value is more than several times the number of ordinary crimps, and many very fine crimps are expressed, which can be said to be finely crimped fibers. If this value is less than 30 pieces / 2.5 cm, crimping is insufficient even after heat treatment, and there are no features in the appearance and texture after the flocking process. Absent.
[0007]
In order to obtain a polyester fiber having latent crimping ability used in the present invention, it is necessary to appropriately combine the types of two polyester components constituting the eccentrically bonded composite fiber and the degree of polymerization.
For example, polyethylene terephthalate is preferably used as polyester A constituting one of the composite fibers. On the other hand, the polyester B constituting the other of the composite fiber is mainly composed of ethylene terephthalate units, and copolymer components such as isophthalic acid, 5-sulfoisophthalic acid, bisphenol A, diethylene glycol, and polyethylene glycol are used alone or in combination of two or more. Those copolymerized by 2 to 20 mol% are preferably used.
[0008]
Further, the polyester fiber having latent crimping ability may have a round cross section, an irregular cross section, a hollow shape, or a non-hollow shape. Furthermore, the fineness is not particularly limited and may be determined according to the required characteristics depending on the application, but generally those having 1 to 20 denier are used.
The use ratio of the fiber having latent crimping ability used in the present invention is preferably 100%, but the characteristics can be exhibited even when blended with other fibers at 20% or more.
[0009]
The conjugate fiber in the present invention can be produced by a method generally following the prior art.
That is, first, spinning is performed using a general-purpose composite melt spinning apparatus. In spinning, a stabilizer, a fluorescent agent, a pigment, a reinforcing material and the like may coexist.
The spun fiber is stretched and heat-treated continuously or in a separate step as necessary, but the degree of latent crimping ability of the fiber can be controlled by the stretching and heat-treating conditions.
[0010]
The fiber is provided with an oil agent and drawn to tens of thousands to millions of deniers to make straight tows without crimps.
Moreover, in this invention, it is necessary to dye | stain the polyester fiber which has latent crimp ability on the conditions which do not express spiral crimp substantially. A pile that exhibits microcrimping cannot be subjected to flocking. To dye polyester fibers with latent wound Chijimino substantially conditions spiral crimp does not occur, for example, the pile after cutting the door window below the predetermined cut length of the pile 3mm does not move freely There is a method of pushing into a container and storing and dyeing. The straight fibers dyed by such a method are dried by separating the fibers one by one.
[0011]
The flocking method includes machining, electrostatic processing, hair transplant processing, high-frequency processing, etc., and general electrostatic flocking processing is performed as follows. That is, the principle is that fiber powder is supplied to one of the electric fields applied with a high voltage, charged, accelerated in the direction of the base material applied with the adhesive placed on the other side of the electric field, and thrown into the adhesive. Adhesives include water-based acrylic emulsion types, solvent-based polyurethanes, epoxies, synthetic rubbers, and polyvinyl acetate types.
[0012]
After flocking, it is heated to 120 to 200 ° C. to reveal latent crimps, and a flocked product having a unique appearance and soft texture similar to suede type leather can be obtained. In addition, since the pile is upright with respect to the base material, the usual flockey processed product has a drawback that the pile collapse is noticeable when the surface is rubbed by hand. However, if the fiber obtained in the present invention is used, the pile is piled up. There is also an advantage that pile collapse is not noticeable even if the surface is rubbed. Furthermore, since the pile is not upright, there is an advantage that dust (waste and cotton dust) is difficult to adhere and is difficult to get dirty. In addition, if fibers dyed in various colors are mixed and flocked, a product with a multicolored melange tone and a unique appearance and texture can be obtained.
[0013]
Flocky processed products using polyester fiber obtained in the present invention are interior goods, partitions, partitions, electrical parts (cooling air outlets for air conditioners), automobiles and vehicle interior materials, jewelry boxes, accessory cases, and dolls. In addition to surface processing such as the above, it can also be applied to a non-slip portion of a portion that hits a finger of a writing instrument.
[0014]
[Action]
If the shortcut polyester fiber used for the flocking process is manufactured by the method of the present invention, it is a straight fiber without crimping at the time of the flocking process, so that it can be processed efficiently and uniformly. Realize.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described with reference to examples. The characteristic value measurement method is as follows.
(1) Relative viscosity Measured at a sample concentration of 0.5 g / dl and a temperature of 20 ° C. using an equal weight mixture of phenol and ethane tetrachloride as a solvent.
(2) The latent crimpable fiber was heat-treated at 170 ° C. for 5 minutes in a state where it could freely shrink, and then the number of crimps was measured by the method of JIS L-1015 7.12.1.
Example 1
Two types of chips of polyethylene terephthalate copolymer polyester having a relative viscosity of 1.45 obtained by copolymerizing 4 mol% of polyethylene terephthalate having a relative viscosity of 1.38 and 3 mol% of ethylene oxide 2 mol adduct of bisphenol A and isophthalic acid. After drying under reduced pressure, the mixture was melted using an ordinary composite melt spinning apparatus and composite melt-spun at a spinning temperature of 285 ° C. so that the two components were combined side by side (weight ratio 1: 1).
[0016]
After cooling the spun yarn, it was drawn at a take-up speed of 1000 m / min to obtain an undrawn yarn. The resulting yarn is converged, drawn at a draw ratio of 3.4 times, drawn at a drawing temperature of 75 ° C., heat-treated with a heat drum at 110 ° C., and then cut without any fineness 2d and single yarn strength 5.3 g / d. A polyester tow having a total denier of 820,000 denier was produced from latent crimpable fibers having a single yarn elongation of 48% and a latent crimping capacity of 70 pieces / 25 mm . The toe of this pile cut to 2mm in guillotine cutter, fiber has a lid packed to such an extent that does not move freely in the basket which was made of wire mesh. This was placed in a dyeing bath and dyed red with a disperse dye at 120 ° C. After dyeing, the pile is dried, electrostatic flocking is performed in the usual way , and heat treatment is performed. As a result, fine crimps appear in the pile, and the flockey has a unique appearance and soft texture similar to suede leather Could be a product.
Comparative Example 1
In Example 1 , it carried out similarly to Example 1 except reducing the quantity of the pile put into a basket and dye | staining in the state which a pile moves freely when it puts into a dyeing bath. In the pile after dyeing, the bending of the pile due to the manifestation of fine crimps was observed. Moreover, when this pile was used for electrostatic flocking, it could not be processed uniformly because of pile bending.
[0017]
【The invention's effect】
As described above, according to the present invention, since the straight fibers do not have crimps during the flocking process, the fibers can be processed efficiently and uniformly. When heat treatment is performed during the flocking process, fine crimps become obvious. Further, if the fiber obtained in the present invention is used, the pile is bent, so that there is an advantage that the pile collapse is not noticeable even if the surface is rubbed. Furthermore, since the pile is not upright, there is an advantage that dust (waste and cotton dust) is difficult to adhere and is difficult to get dirty. In addition, if fibers dyed in various colors are mixed and flocked, a product with a multicolored melange tone and a unique appearance and texture can be obtained.

Claims (2)

170 to ℃ pile after cutting the polyester fiber to a Jo Tokoro cut length of the pile with a free shrink heat treatment by 30 /2.5cm more latent winding Chijimino can express a spiral crimp of not move freely A method for producing a short-cut polyester fiber, characterized in that it is dyed in a state of being housed in a container without substantially developing spiral crimps. 170 to ℃ pile after cutting the polyester fiber to a Jo Tokoro cut length of the pile with a free shrink heat treatment by 30 /2.5cm more latent winding Chijimino can express a spiral crimp of not move freely In a state of being housed in a container, it is characterized by performing a flocking process using shortcut polyester fibers obtained by dyeing without substantially developing spiral crimps, and then heat treating them to develop crimps. Flocky processing method using shortcut polyester fiber.