JPH1136165A - Production of pile-raised knitted fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pile-raised knitted fabric having flash burn resistance by using the blended yarns of flame-retardant regenerated cellulose fibers with cotton yarns as pile yarns and polyester yarns as ground yarns to produce a pile knitted fabric, and subsequently subjecting the pile knitted fabric to post-processing treatments and a flame-resistant processing treatment. SOLUTION: This method for producing a pile-raised knitted fabric comprises using blended yarns comprising >=30% of flame-retardant regenerated cellulose fibers such as flame-retardant polynosic yarns and <70% of cotton yarns as pile yarns and polyester multifilament yarns as ground yarns to produce a pile knitted fabric, subjecting the pile knitted fabric to a dyeing processing treatment and a raising processing treatment, dipping the processed knitted fabric in a processing liquid comprising an aqueous solution containing a flame retardant consisting mainly of a dialkylphosphonocarboxylic acid amide and a melamine resin capable of directly reacting with the hydroxyl groups of cellulose molecules, etc., drying the dipped knitted fabric and subsequently thermally treating the dried fabric.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a pile-punched knitted fabric having an anti-flash burn property, an antistatic property and a soft feeling.

[0002]

2. Description of the Related Art In general, brushed knitted fabrics are widely used as autumn and winter garment products because of their heat retention and comfort. As a method for producing these brushed knitted fabrics, a knitted fabric is knitted using a spun yarn made of a cellulosic fiber, which is a hydrophilic fiber, and then brushed by a method such as needle cloth brushing or emery brushing to finish. It is widely used. However, if a spun yarn made of the above-mentioned cellulosic fiber is used, if the brushed surface is used on the front side, if the fabric comes close to a fire source when worn in a kitchen or the like, it will ignite instantaneously and spread. There is a risk that a so-called flash burn phenomenon occurs, which may be related to the body or life.

[0003] Although a method of applying flameproof treatment to cellulosic fibers has been put into practical use, sufficient anti-flash burn properties cannot be obtained by using the method alone.
There is also a problem such as a drop in strength, and the actual situation is that sufficient products have not been obtained. In Europe and the United States, this kind of brushed product is not used for children's clothing, especially in children's clothing. In Japan, with the enforcement of the PL law last year, this type of brushed product was not used. Are becoming more sensitive and some have refrained from hiring. Therefore, in consideration of the above circumstances, a brushed knitted fabric using spun yarns made of polyester fiber or acrylic fiber has been manufactured. There is a drawback that static electricity is generated and the comfort is impaired.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of such circumstances, and suppresses the generation of static electricity at the time of attachment and detachment, has an anti-flash burn property, and has a soft feeling. It is intended to produce a pile brushed knit.

[0005]

The present invention attains the above object and has the following constitution. That is, the present invention relates to a method of knitting a pile knit using a blended yarn with a cotton fiber containing 30% or more and less than 70% of a regenerated cellulose fiber having flame retardancy as a pile yarn, and using a polyester fiber as a ground yarn. And a method of producing a pile-raised knitted fabric, which is characterized in that a brushing process and a flameproofing process are performed thereafter.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
In the present invention, first, a pile knit is knitted. At the time of knitting, a blended yarn with a cotton fiber containing 30% or more and less than 70% of a regenerated cellulose-based fiber having flame retardancy is used as a pile yarn, and polyester fiber is used as a ground. Knit using yarn. Here, the regenerated cellulosic fiber having flame retardancy is a regenerated cellulosic fiber in which a flame retardant containing a phosphorus compound as a main component is mixed inside the fiber. Wet spinning may be used, and most of the durable fire retardants are made of phosphorus compound derivatives.
The flame retardant mixed into the fiber may be a compound obtained by adding nitrogen to a phosphorus compound from the viewpoint of the synergistic effect of performance, and a compound containing nitrogen such as an amino group or an amide group may be used in combination with the phosphorus compound. It may be.

[0007] The fineness of the regenerated cellulose fiber is determined from the viewpoint of spinnability for spinning a blended yarn with the cellulose fiber.
It should be 0.8 to 3 denier, and the fiber length should be 3
It must be 0 to 51 mm. When producing a blended yarn, spinning may be performed by a known method such as a ring spinning method.
It is necessary that the content of the flame retardant regenerated cellulosic fiber is not less than 30% and less than 70%. If the content is less than 30%, sufficient flame retardancy cannot be obtained. It is disadvantageous in physical properties and economy. The count of spun yarn is 10
/ 1 to 30/1 are preferred. If the count is thicker than 10/1, problems may occur in terms of increase in the basis weight, deterioration of the fabric appearance, difficulty in knitting, and the like. Is not easily obtained.

In the present invention, the pile knitted fabric is manufactured by using a polyester fiber as a ground yarn and knitting the spun yarn as a pile yarn. In terms of equipment, a conventional sinker pile knitting machine can be used. As the knitting structure, for example, a structure such as an inlay, fleece, sinker pile, or the like can be adopted. After knitting of the knitted fabric, ordinary scouring, bleaching and dyeing are performed as necessary. All of the steps can be performed using conventional ordinary equipment.

Thereafter, in the present invention, the obtained knitted fabric is subjected to a raising process and a flameproofing process. Either the raising process or the flameproofing process may be performed first, and there is no particular limitation. At the time of the raising processing, an emery raising machine or a needle cloth raising machine can be used. As for the degree of napping, conventional napping napping can be used satisfactorily, but shallow napping to deep napping may be appropriately performed according to the product item.

The flameproofing treatment is carried out using an aqueous solution of a flameproofing agent containing dialkylphosphonocarboxylic acid amide as a main component, which is reacted directly with the hydroxyl groups of the cellulose molecules in the cellulosic fiber, or the melamine resin is used as a medium. To react with cellulose molecules. This processing is advantageous because it can be performed using general resin processing equipment. A melamine resin may be used in combination for the purpose of improving the flameproof performance of the pile knitted fabric and its washing durability. As the flameproofing process, pad → dry → cure
General resin processing step.

Aqueous solutions containing dialkylphosphonocarboxylic acid amide as a main component are now widely marketed as durable flameproofing agents for cellulose fibers. Specifically, Ciba Geigy's Pyrobatex CP and Meisei Chemical Co., Ltd. Phoscon 82 and the like. After adjusting these processing agents to a predetermined concentration, the squeezing rate is 1 with a mangle.
After squeezing at 100 to 120% and drying at 100 to 120 ° C,
Curing at 150 to 170 ° C. is performed.

After the flameproofing treatment, ordinary alkali soaping is performed using sodium hydroxide or the like in order to remove unfixed dialkylphosphonocarboxylamide and a catalyst for resin crosslinking. The action of the phosphorus compound in the flame prevention mechanism is a chemical change (crosslinking, hydrogen bonding), a dehydration reaction, an endothermic action, an adiabatic action and the like. Phosphorus compounds are often used for the combined effect of nitrogen compounds. In particular, cellulosic fibers
We always apply that synergy. In the present invention, it has been confirmed that sufficient performance can be obtained by the application of the primary flameproofing even if the conventional flameproofing level is not attained, because of the combined use with the flame-retardant fiber. Advantages are obtained in each of physical properties, economy, etc.

[0013]

According to the present invention, a knitted fabric composed of a pile yarn of a blended yarn with a cotton fiber containing 30% or more and less than 70% of a regenerated cellulosic fiber having a flame-retardant pile portion is subjected to a raising process and a fireproof process. If applied, the pile (brushed) part will have flame retardancy and moisture absorption, so the generation of static electricity when attaching and detaching as seen in conventional brushed products using polyester and acrylic, and brushed products with cellulosic fibers In addition to solving the problems such as the flash burn phenomenon observed in the above, the brushed knitted fabric having anti-flash burn properties, having water absorption, antistatic properties and softness, and having stable physical properties can be obtained.

[0014]

EXAMPLES Next, the present invention will be described in more detail with reference to examples. The evaluation of the performance of the fabric in the examples is based on the following results for the finished samples and the samples after 10 home washings according to the JISL-0217,103 method. Was performed in the manner described above. (1) Anti-flash burn property The presence or absence of the flash burn phenomenon was evaluated by a flash test Boken method (vertical method; original for CS-191 quasi-specification). (2) Hand feeling The following four-stage judgment was made relatively by the sensitivity test. ◎: very flexible ○: soft soft △: slightly hard
×: Hard (3) Static electricity prevention method The generation of static electricity was relatively determined in the following three stages by a wearing test. ○: None △: Somewhat ×: Yes

Example 1 After blending cotton so that the ratio of flame-retardant polynosic fiber was 30% and that of cotton fiber was 70%, a blended yarn 10/1 was obtained by an ordinary ring spinning method. This blended yarn is used for pile yarn, and the back yarn is knitted using a 30-inch 18G sinker pile knitting machine using polyester fiber 75d / 48f as ground yarn, followed by ordinary scouring, bleaching and dyeing processing Was done. Next, after the fabric was opened, the clothing was brushed using a clothing napping machine so that the width of the fabric became 180 cm to 165 cm.

Here, the following formulation 1
Impregnated with a flame-proofing treatment solution, squeezed with a mangle at a squeezing rate of 60%, dried at 100 ° C. for 2 minutes, and then
Curing was performed at 60 ° C. for 3 minutes. Formulation 1 Pyrovatex CP 400 g / l (fiber-reactive organophosphorus flame retardant, manufactured by Ciba Geigy) Sumitex Resin M-6 100 g / l (melamine resin, manufactured by Dainippon Ink Co., Ltd.) Phosphoric acid (75%) 35 g / 1 liter Wool latex FSA 30 g / liter (silicone softener, Ciba-Geigy) Actinol R100 2 g / liter (anionic surfactant, Matsumoto Yushi Co., Ltd.)

Thereafter, ordinary alkaline soaping was carried out at 80 ° C. for 5 minutes using sodium carbonate, washed with hot water at 100 ° C., and dried at 100 ° C. for 1 minute to obtain a pile brushed knitted fabric of the present invention.

For comparison with the present invention, the present embodiment is completely different from the present embodiment except that ordinary cotton yarn 10/1 and polyester spun yarn 10/1 are used instead of the blended yarn used for the pile yarn. Pile brushed knitted fabric for comparison by the same method (Comparative Example 1 and Comparative Example 2, respectively)
I got For comparison with the present invention, a pile brushed knitted fabric for comparison (Comparative Example 3) was obtained in exactly the same manner as in this example except that the flameproofing treatment after raising was omitted in this example.

The performances of the present invention and the pile-pile knitted fabric for comparison were evaluated, and the results are shown in Table 1.

[0020]

[Table 1]

As apparent from Table 1, the pile brushed knitted fabric according to the method of the present invention has excellent anti-flash burn properties, excellent antistatic properties, and a soft feel.

Example 2 A pile brushed knitted fabric of the present invention was obtained in exactly the same manner as in Example 1 except that the flameproofing step was performed before the brushing step in Example 1 above.

For the purpose of comparison with the present invention, the present embodiment is different from the embodiment 2 in that a normal cotton yarn 10/1 and a polyester spun yarn 10/1 are used instead of the blended yarn used for the pile yarn in the present embodiment. A pile raising knitted fabric for comparison (Comparative Example 4 and Comparative Example 5 respectively) was obtained by exactly the same method. For comparison with the present invention, a pile brushed knitted fabric for comparison (Comparative Example 6) was obtained in exactly the same manner as in Example 2 except that flameproofing after raising was omitted in this example.

The performance of the present invention and of the pile-pitched knitted fabric for comparison were evaluated, and the results are shown in Table 2.

[0025]

[Table 2]

As is clear from Table 2, the pile-knitted fabric according to the method of the present invention has excellent anti-flash burn properties, excellent antistatic properties, and a soft feel.

[0027]

According to the method of the present invention, although the pile portion is a brushed knitted fabric made of cellulosic fibers, the pile brushed knitted fabric has excellent anti-flash burn properties and antistatic properties, and has a soft feel. Obtainable.

Claims (1)

[Claims] 1. A knitted pile knit using a mixed yarn of cotton fiber containing 30% or more and less than 70% of regenerated cellulosic fiber having flame retardancy as a pile yarn and polyester fiber as a ground yarn. A method for producing a pile-brushed knitted fabric, which comprises performing a brushing process and a flameproofing process later.