JPH06116858A - Pile carpet - Google Patents

Abstract

PURPOSE:To obtain pile carpet having uniform appearance of pile and excellent wear resistance by using braided ribbon-like folded yarn prepared by firstly twisting bulky textured filament yarn of polyamide, secondarily twisting (middle twisting) the firstly twisted yarn in good twisting balance, further finally twisting (ply twist) the twisted yarn. CONSTITUTION:Bulky textured multifilament yarn of nylon is firstly twisted in the Z (or S) direction, plural twisted yarns are secondarily twisted in the Z (or S) direction, jointed, further plural twisted yarns are joined, finally twisted in the Z (or S) direction and terminally set in good balance of twist to give braided ribbon-like folded yarn having small residual torque, consequently causing snarl hardly, having high density of yarn. The folded yarn is used as pile yarn, tufted in a primary ground fabric, which is subjected to backing treatment to give a carpet of loop pile or cut pile.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile carpet, and more particularly to a loop or cut pile carpet using a bulky yarn made of polyamide multifilament.

[0002]

2. Description of the Related Art As a conventional pile carpet, so-called single-twisted yarn, in which a single yarn or two or more single yarns are aligned and twisted in only one of the left and right directions, or 2
Processed into a loop or cut pile carpet using a so-called plied yarn in which two or more yarns are twisted in the direction opposite to the one before being aligned, or a so-called mixed fiber yarn in which two or more yarns are entangled by air or other gas flow Or, after subjecting the above single-twisted yarn and mixed-fiber yarn to generally appropriate additional twisting,
Alternatively, it is known that plied yarns are heat-set by saturated steam, dry heat, etc. to stop twisting and then processed into loops or cut pile carpets.

[0003]

However, in the conventional pile carpet, the yarn density is low, the pile tips are uneven, and unevenness is likely to occur, and the pencil point property (when cut) is obtained when a cut pile carpet is used. The tip of the pile thread is set by steam set, etc., and the pile is prevented from opening, etc., and each pile is set like the tip of a pencil.) There is a drawback that.

The object of the present invention is to provide a loop carpet which has a high yarn density, a uniform pile tip, and a high durability and elasticity.
Another object of the present invention is to provide a pile carpet having a high pencil point when used as a cut pile carpet.

[0005]

Means for Solving the Problems The present inventors have found that the above object can be achieved by using, for example, a braided compound twisted yarn obtained by aligning and re-twisting a plurality of conventional plied yarns. Has reached the present invention. The present invention is formed by twisting (twisting) a plurality of bulk-processed polyamide multifilaments, ply-twisting (medium-twisting), and further re-twisting (twisting) plural plied yarns in the twisting direction. Is lower twist, middle twist, upper twist in the order of Z, S, Z or S,
The pile carpet has Z and S twists, and the number of twists is set so as to maintain the twist balance of the finally plied yarn.

Examples of the polyamide multifilament constituting the pile carpet of the present invention include multifilaments made of an aliphatic polyamide such as nylon 6, nylon 66 or a copolymer thereof. The total denier of the multifilament is preferably 1,600 to 16,000 denier, and the single yarn denier is preferably 400 to 4,000 denier. If the total denier is too thin, it is not suitable for carpets, and if it is too thick, it is difficult for tufting machines. If the single yarn denier is too thin, it will be too soft, and if it is too thick, it will be too hard and both are unsuitable for carpets. The filament cross section of each single yarn may be circular, but it is preferable that the filament has an irregular cross section such as a normal triangle or quadrangle. Further, the filament may have one or more hollow portions continuous in the length direction.

In the present invention, the multifilament can be composed of two or more kinds of single yarns, for example, two or more kinds having different filament cross-sectional shapes, denier, thermal properties, mechanical properties, dyeability and the like. You may comprise by the single yarn. Bulkiness processing of the bulky processed polyamide multifilament includes spraying, pushing, false twisting,
Any of bulky processing such as knit and denit may be used, but among these, jet processing is particularly desirable.

The bulky processed yarn may include low melting point fibers having a melting point of 70 to 120 ° C. so that the single yarns constituting the multifilament are partially fused to each other. When such low-melting-point fibers are mixed, these fibers are fused during the post-heat treatment such as heat setting, so that the sizing property of the entire yarn is enhanced, which is preferable. In the present invention, the above-mentioned polyamide multifilament is preferably 70 to 200 times / m, and more preferably 90 times.
A plurality of twisted yarns (lower twisted) with a twist number of up to 150 times / m are plied (medium twisted), and a plurality of the obtained plied yarns are re-twisted (upper twisted) to produce a braided mixed twisted yarn. To do. The twist direction in this case is Z, Z, and Z in the order of Z,
The number of middle twists is S, Z or S, Z, S, and the number of twists of each of them is Z (70 to 200 times / m) as the upper twist so that the overall twist balance is maintained. Y is Y = (2.0 to 5.0) × Z, the number of twists of the lower twist x
Is adjusted so that x = (1.2 to 2.5) × Z. By setting the number of twists of upper twist, middle twist and lower twist in such a range, the torque balance of Z twist and S twist is maintained, and the torque of the finally obtained plied yarn is zero or close to this. can do. The above twisted yarn is
For example, using a ring twister, lower twist, middle twist and upper twist 3
Processed in the process, or plied yarn (undertwist,
It is possible to process the middle twist and process it in two steps of re-twisting (upward twist).

In the present invention, the braided mixed twisted yarn obtained as described above is processed into a loop pile carpet or a cut pile carpet by a known method. The loop pile carpet may be tuft, woven or knitted carpet, but tufted carpet is most preferable from the viewpoint of productivity.

[0010]

EFFECTS OF THE INVENTION According to the present invention, by using the polyamide multi-filament yarn in which the upper twist is added to the lower twist, the middle twist, the residual torque is small, snare is hard to occur, the yarn density is high, and the unique It has a braided appearance, there is no unevenness when made into a loop pile, the pile appearance is uniform, it has excellent wear durability, and because it is high density, dirt such as earth and sand is hard to collect and it is highly elastic, In addition, it is possible to obtain a loop pile carpet having an excellent walking feeling. Further, since the tip of the pile is uniform and the residual torque is small, the pencil point property of the cut pile carpet is excellent, and the durability of the pencil point property itself is also excellent.

Examples of the present invention will be described below. The measuring methods for each evaluation item in the examples are as follows. (1) Practical test method for 100,000 people: Sample (100 cm x 25 cm
(Enclosed with a gold frame) is constructed on stairs with many passersby, the number of passing people is measured at the counter, vacuum cleaning is performed for 1 minute with a household vacuum cleaner every 10,000 people passing, and a sample random number table 10 for each sample while exchanging based on
Repeated times, appearance, dust accumulation such as sediment, etc. were evaluated.

(2) Appearance: The above-mentioned sample after the practical test is compared with the sample before the test, and its defects (for example, defects such as a pile to be upright bent or depressed) are observed. Was evaluated, and the following five defects were evaluated. 5th grade 4th grade 3rd grade 2nd grade 1st Defect number 0-20 21-40 41-60 61-80 81- (3) Sediment accumulation: The total amount of solids such as sediment after the above-mentioned practical test is measured and It was evaluated in 5 levels as follows.

5th grade 4th grade 3rd grade 2nd grade 1st grade Solid content 〜25 26〜50 51〜100 101〜199 200〜 (g / 0.25m ² ) (4) Elasticity: Compressive elasticity of sample after practical test Rate JI
Tested by the method of S-L-1021-6.10.
The compressive elastic modulus was obtained and evaluated in the following 5 grades.

5th grade 4th grade 3rd grade 2nd grade 1st grade Compression modulus 〜 95 94 〜 90 89 〜 85 84 〜 80 79〜 (%) (5) Pencil point property: The pile thread thickness at the tip of the cut pile is normal. Those that were 20% or more larger than the products were regarded as defects, and were evaluated in the following 5 grades.

5th grade 4th grade 3rd grade 2nd grade 1st grade Number of defects 0 to 20 21 to 40 41 to 60 61 to 80 81 to (6) Abrasion resistance: 100,000 people Pile yarn after a practical test by a practical test method The degree of wear was compared with that before the practical test, and the degree of wear was visually evaluated on a five-point scale.

[0016]

【Example】

Example 1 Nylon bulky processed multifilament (hereinafter sometimes referred to as bulked continuous fiber: BCF) 1300 d / 68f single-dyed yarn was twisted 220 times / m in the Z direction, and then Then, these two lower twisted yarns were combined and subjected to middle twisting of 310 times / m in the S direction, and further two of these middle twisted yarns were combined and subjected to upper twisting of 140 times / m in the Z direction to obtain a pile yarn.

This pile yarn was tufted by a 5/32 gauge tufting machine onto a polyester non-woven fabric (base fabric weight 120 g / m ² ) using a loop pile having a pile length of 6 mm and a stitch of 7 st / in as a primary base fabric. , And back-coated with polyvinyl chloride latex to produce the loop pile carpet of the present invention. Example 2 Nylon BCF 800d / 40f dyeing type yarns, three types of acid dyeing deep dyeing yarn (R), acid dyeing light dyeing yarn (P), and cationic dyeing yarn (C) Regarding the yarns, each single yarn is first twisted 220 times / m in the Z direction, and each of the two twisted twisted yarns is combined with a middle twist in the S direction to form R × R, P × P and C × C yarns. 3 kinds of middle twisted yarn,
The three types of middle twisted yarns were combined and twisted 140 times / m in the Z direction to obtain a pile yarn.

A loop pile having a pile length of 5 mm and a stitch of 8 st / in was tufted with a polyester non-woven fabric as a primary base fabric by using a 1/8 gauge tuft machine to tuft the pile yarn with an acid dye (Techtilon Blue 0.1. 2% ow
f), and a cationic dye (Irgalan black 0.1
% Owf) is used for normal Wins dyeing with a Wins dyeing machine, and after drying with a pin tenter, SBR
Lining was performed using a latex of (styrene-butadiene rubber) and jute as a commonly used secondary base fabric to produce a loop pile carpet of the present invention.

Example 3 A middle-twisted yarn was prepared in the same manner as in Example 1, and two middle-twisted yarns and a low melting point fiber (Flor 100d / 2 manufactured by Unitika Ltd.) were used.
4f, "Flor" is a registered trademark), which was twisted 140 times / m in the Z direction and heat-set at 125 ° C for 20 minutes by a vacuum setting machine to obtain a pile yarn.

This pile yarn was cut into a pile having a length of 12 mm and a stitch of 7 st / in by a tufting machine of 5/32 gauge, and a polypropylene tape yarn (100) which is generally used for carpet as a primary base cloth.
A plain woven fabric of 0D) was tufted and back-treated with SBR latex and jute to produce a cut pile carpet of the present invention.

Comparative Example 1 Two monofilament yarns of the original yarn used in Example 1 were combined and twisted in the Z direction at 40 turns / m to form a pile yarn, and thereafter, in the same manner as in Example 1. A loop pile carpet was manufactured. Comparative Example 2 230 times / m in the S direction for the single yarn of the spun yarn used in Example 1.
Twist the undertwisted yarn, then combine the two undertwisted yarns and twist the yarn 160 times / m in the Z-direction using a vacuum setting machine.
The yarn for pile was set by heat setting at 25 ° for 20 minutes, and then, a loop pile carpet was manufactured in the same manner as in Example 1.

The evaluation results of the carpets obtained in the above Examples and Comparative Examples are shown in Tables 1 and 2.

[0023]

[Table 1]

Examples 4 and 5, Comparative Examples 3 and 4 The pile yarns obtained in Examples 1 and 2 and Comparative Examples 1 and 2 were piled with a 5/32 gauge tuft machine to have a pile length of 12 mm and a stitch of 7 st / in. With a cut pile of
Polyester non-woven fabric as the primary base fabric (base fabric weight 120 g
/ M ² ), and each was lined with polyvinyl chloride latex to produce a cut pile carpet. Table 2 shows the evaluation results of these carpets.

[0025]

[Table 2] As is clear from Table 1, the carpet obtained by the present invention has a uniform loop and an excellent appearance, less accumulation of dust such as earth and sand, and extremely excellent elasticity and abrasion resistance. Further, when the cut pile carpet is used, it is apparent that not only the appearance but also the pencil point property and the abrasion resistance are extremely excellent as shown in Table 2.

Claims (1)

[Claims] 1. A twisted (bottom twisted) bulky processed polyamide multifilament is plied (medium twisted), and a plurality of the plied yarn is re-twisted (top twisted) to form a plied yarn. The direction is Z, S, Z or S, Z, S twist in the order of lower twist, middle twist, and upper twist, and the number of twists of these is to maintain the twist balance of the finally plied yarn. A pile carpet characterized by being set to.