JPH04272251A - Pile fabric having pencil point-like touch - Google Patents

Abstract

PURPOSE:To obtain the subject pile fabric having an excellent pencil point-like touch by using, as the pile yarn, a spun yarn blended with a specified ratio of a modified acrylic fiber carrying >=a specified amount of a solvent for acryls, adhering on the surface thereof. CONSTITUTION:A spun yarn is formed by blending >=20wt.% hot melt acrylic fiber composed of an acryl fiber carrying >=0.5wt.% solvent for acryls, e.g. dimethyl sulfoxide, dimethylacetamide, dimethylformamide, sulfolane or ethylene carbonate adhering on the surface. A fabric is woven by using the above- mentioned spun yarn as the pile yarn and the resultant woven fabric is subsequently subjected to hot melt adhesion process at >=100 deg.C for >=30sec by using a tenter drier for mutual fusion between single fibers constituting the pile yarns, thus giving the objective pile fabric having a pencil point-like touch and excellent in stiffness and abrasion resistance.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pencil point pile knitted fabric.

0002

[Prior art] Pencil point pile knitted fabric is
If a blended yarn made by blending heat-fusible fibers is used as a pile yarn, the ends of the pile will be gathered together by heat treatment and a good knitted fabric will be produced without opening. Conventionally, heat-fusible fibers include, for example, Chisso Corporation's E, which has a polypropylene core and a polyethylene sheath.
SC fibers are well known. A similar composite heat-fusible fiber is described in Japanese Patent Publication No. 54-44773. However, heat-fusible fibers have not yet been developed for acrylic and acrylic fibers that are not heat-fusible fibers. A yarn made by blending acrylic and ESC fibers had a serious drawback in that the ESC fibers were not dyed with basic dyes during dyeing, leaving them white and significantly reducing their commercial value. Furthermore, since ESC fibers are composite fibers of polypropylene and polyethylene, it has been difficult to impart flame retardancy to them.

0003

SUMMARY OF THE INVENTION An object of the present invention is to provide an excellent pencil point pile knitted fabric that can be easily dyed with basic dyes.

0004

[Means and effects for solving the problems] The present invention provides a spun yarn in which the pile yarn is blended with at least 20% by weight of modified acrylic fibers, which are impregnated with 0.5% by weight or more of an acrylic solvent substantially from the fiber surface. It is a pile knitted fabric characterized by being made of yarn.

The blended yarn of heat-fused acrylic fibers used in the present invention is a blend of at least 20% by weight of heat-fused acrylic fibers impregnated with 0.5% by weight or more of an acrylic solvent from the fiber surface. It is characterized by the fact that it is used for pile yarn.

The acrylic fiber used as a raw material for the heat-fused acrylic fiber used in the present invention may be a general acrylic or acrylic fiber containing acrylonitrile as a main component. That is, as the second comonomer, methyl acrylate,
Vinyl acetate, acrylamide, acrylic acid, vinyl chloride, vinylidene chloride, etc. can be used, and the second comonomer is included in the polymer in an amount of 0 to 60% by weight. In addition, as the third monomer, sodium allylsulfonate, sodium methacrylsulfonate, sodium 2-acrylamide 2-methylpropanesulfonate, etc. can be used;
Comonomer is present in the polymer in an amount of 0.5 to 4% by weight.

[0007] The polymerization method may be either solution polymerization or suspension polymerization, and is not particularly limited. There are no particular problems with the spinning method, either wet or dry. For example, commercially available acrylic fibers or acrylic fibers defined in the Household Goods Quality Labeling Act may be used, such as Cashmilon, Exlan, Bonnell, Bethlon, Toleron, and Kanekalon. In addition, even if the raw material acrylic fiber has been dyed,
It may be dyed cotton.

The solvent used for producing the heat-fused acrylic fiber used in the present invention may be a general organic solvent for acrylic. For example, dimethyl sulfoxide (hereinafter abbreviated as DMSO), dimethylacetamide (hereinafter abbreviated as DMA), dimethylformamide (hereinafter abbreviated as DMF), sulfolane (hereinafter abbreviated as SO), and ethylene carbonate (hereinafter abbreviated as EC). ) etc. can be used. Among these, sulfolane, which has a high boiling point, is good. A plurality of solvents may be used as a mixed solvent.

It is preferred that the solvent be applied substantially uniformly to the fibers. In order to attach a small amount of solvent (approximately 0.5% by weight) to the fibers, there is a method of directly spraying the solvent and then mixing the fibers thoroughly, but it is also possible to apply a solvent with a diluent that easily evaporates, such as water or acetone. There are fewer adhesion spots when it is attached after diluting it. The method of attachment may be a dipping method or a spraying method. Although not particularly limited, the dipping method is preferable because it causes less spots of adhesion. The amount of solvent attached is 0.5% by weight based on the weight of the fiber.
If it is less than that, the heat fusion effect will be small. Preferably, it is 1% by weight or more. If particularly strong strength is required, the amount is preferably 3% by weight or more.

[0010] In order to impregnate the fiber with the solvent and to dry the diluent, the solvent is applied and then dried. An important point of the present invention lies in the above drying temperature. That is, as drying progresses, the fibers swell and are simultaneously impregnated with the solvent by the solvent on the fiber surface, but if the drying temperature is too high, the fibers will adhere to each other. If the drying temperature exceeds 80° C., adhesion will become significant, which is not preferable. Although drying efficiency decreases at 70℃
Below, the temperature is more preferably 60°C or below. The heat-fused acrylic fiber used in the present invention may be slightly sticky due to drying, but if it is slightly sticky, it is sufficient to spread the fibers well before blending.

The spinning method used in the present invention may be any commonly used method. Namely, short spinning, semi-worsted spinning,
Worsted spinning, air spinning, knot spinning, etc. can be used. In order to blend heat-fused acrylic fibers and other fibers, it is necessary to blend them uniformly, so a draw mix is not preferred. The cotton must be thoroughly blended by passing it through a cotton blending machine before being added to the card. If the cotton mixture is insufficient, the heat-sealing effect will be uneven, causing unevenness in the product.

[0012] The obtained spun yarn is placed on a conventional pile knitting machine or loom. The obtained pile knitted fabric is heat-treated, for example, in a tenter-type hot-air dryer at 100° C. or higher for 30 seconds or longer to undergo heat-sealing treatment. When the blending ratio of heat-fused acrylic fibers is low, heat treatment is preferably performed at 110° C. or higher for 1 minute or longer in order to further strengthen the heat-fused bond. The spun yarn may be heated and fused at a high temperature of 200° C. for 0.3 seconds for a short time using a plate heater or the like, and then set on a pile knitting machine or a loom.

[0013]

Effects of the Invention The heat-fused pile knitted fabric using the spun yarn blended with the heat-fused acrylic fibers of the present invention exhibits an excellent pencil point tone because the single fibers of the yarn are fused to each other. Heat-fused pile resists friction and strengthens the waist. Further, after heat-sealing, the product can be dyed in the form of a pile knitted fabric. Furthermore, when flame-retardant acrylic fiber is used as modified acrylic fiber, excellent flame retardancy can be imparted.

[0014]

[Example] Further details will be explained in Examples below. In the examples, "%" indicates "% by weight".

[0015] The washing test was conducted using a household washing machine using JIS
It was treated five times according to the L-1042 electric washing machine method and used as a measurement sample. The flammability of knitted fabrics is JIS L-1.
The carbonization length was measured according to the 09145° micro burner method.

Example 1 Commercially available Kanebo Acrylic RK1BR (consisting of 90% by weight of acrylonitrile) 10 d x 152 mm was used as a raw material acrylic fiber. 100g of acrylic fiber
ml of an aqueous solvent solution under the conditions shown in Table 1.

[0017] After attaching the solvent to the fibers by the dipping method,
It was squeezed using a centrifugal dehydrator and dried using a hot air dryer under the conditions shown in Table 2. Drying condition No. At 85° C. in No. 1, the single fibers were already strongly heat-fused during drying and could not be spun. Drying condition No.
．． At 70°C in No. 2, the single fibers were slightly heat-fused during drying, but spinning was possible although there were many neps. Drying condition No. At 60° C. in No. 3, the single fibers were hardly thermally fused during drying, so there was no problem in spinning. The heat-fused acrylic fibers obtained by drying at 60°C are mixed with ordinary acrylic in a blending machine at the blending rate shown in Table 3, passed through a gill-type drawing machine twice to make a sliver, and semi-worsted. Number of twists: 190 times/m using a spinning machine
The yarn was blended to obtain No. 10 single yarn. Next, the yarn was twisted 90 times/m using a double twister to obtain a double yarn. The obtained twin yarn was heated to 110℃3
Dry heat treatment was performed for 1 minute.

A test sample of cut pile fabric having a 1/8 gauge, 3 mm stitches, and 7 mm pile length was prepared using a cut sewing machine MC-AII manufactured by Murakoshi Sewing Machine Co., Ltd. using the double yarns after the dry heat treatment.

[0019] Pile soil test sample JIS L 10
21 Thickness reduction rate by dynamic loading According to method A, the number of rotations is 1
The degree of fiber opening at the tip of the pile was observed and evaluated before and after the pile was applied 00, 200, and 300 times. The evaluation results are shown in Table 3.

Test No. Examples 1 to 5 of the present invention had almost no opening at the end of the pile and exhibited excellent pencil point tone.

Example 2 Commercially available Kaneboulfunen VH1DL (consisting of acrylonitrile weight %) 2d x 51 mm was used as a raw material acrylic fiber. In the same manner as in Example 1, 10g of this acrylic fiber was immersed in 100ml of an aqueous solvent solution under the conditions shown in Table 1.

[0022] After attaching the solvent to the fibers by the dipping method,
Squeezed with a centrifugal dehydrator and drying condition No. 2 in Table 2. It was dried in a hot air dryer under the conditions shown in 4. The obtained heat-fused acrylic fiber was mixed with a blending rate of 30% by weight to produce ordinary Kanebo Funen VH1D.
It was mixed with L2dx51mm using a cotton blending machine, passed through a roller drawing machine twice, made roving using a roving machine, and blended with a short spinning machine at a number of twists of 290 times/m to obtain No. 10 short yarn. . Next, the yarn was twisted 140 times/m using a double twister to obtain a double yarn. The obtained double yarn was subjected to a dry heat treatment at 110° C. for 3 minutes.

After the dry heat treatment, a cut pile fabric having a 1/8 gauge, 3 mm stitches, and 7 mm pile length was prepared using a cut sewing machine MC-AII manufactured by Murakoshi Sewing Machine Industry.

After this pile fabric was dyed with a cationic dye using a paddle dyeing machine in a conventional manner, the state of fiber opening at the tip of the cut pile was observed. The tip of the cut pile after dyeing with the paddle dyeing machine maintained an excellent pencil point tone without opening. This pile fabric was subjected to a combustion test using a 45° micro burner method, and as a result, the char length was 15 mm, indicating excellent flame retardancy.

[0025]

[0026]

[0027]

Claims (1)

[Claims] Claim 1: The pile yarn is made of a spun yarn in which at least 20% by weight or more of modified acrylic fibers are impregnated with 0.5% by weight or more of an acrylic solvent substantially from the fiber surface. Pile knitted fabric.