JPH08112229A - Rental mop cord - Google Patents

Abstract

PURPOSE: To provide a rental mop cord which is excellent in dust absorption and collection, texture and durability and is almost free from untwisting and breaking up of a cord, and falling off of fibers and pilling of a cord even after using for a long period of time through repeated washing and recycling. CONSTITUTION: In a rental mop cord made by twisting multiple spun yarns of crimped nylon staple fibers through low-melting point nylon fused yarns and fusing spun yarns mutually through fused yarns, crimped nylon staple fibers are single fibers of 0.5 to 6-denier, and staple fibers with a fiber length of 30 to 80mm and a 5 to 40% crimping rate, and the single fiber tensile strength at cord state is reduced at 6gf/d or less.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rental mop cord, and more particularly, when it is used as a mop, it has excellent dust-adsorbing and collecting properties, texture and durability, and in particular, twists and looses of cord yarn. The present invention relates to a rental mop cord which causes almost no falling out of fibers and fibers, and in which pilling does not occur in the cord yarn even after repeated washing and reproduction and long-term use.

[0002]

2. Description of the Related Art Generally, as a mop for rental, a mop base cloth having an attaching portion to a gripping tool and a mop cord sewn or tacted on at least one surface of the base cloth are used as a dust-adsorbing oil agent or the like. Those coated or impregnated with are widely used. In addition, for rental mops, a system is usually used that lends mops to users for a certain period of time, collects and cleans dirty mops, reattaches oil agents, regenerates them, and provides them to users again. Has been done.

[0003] As mop cords for rental mops, those made of cotton yarn have been conventionally used in many cases, but mop cords using these cotton yarns are broken during use, the cord yarns are frayed, untwisted and loose. There is a defect that skeins often occur, and in order to avoid such defects such as fraying, untwisting, and loosening, for example, a yarn bundle formed from a sweet twisted yarn obtained by combining thick cotton single yarns is used. A method of mercerizing to a specific shrinkage (Japanese Patent Publication No. 51-795)
No. 5, gazette) and the like have been proposed, but they have not been completely solved yet.

Recently, a mop using a synthetic fiber, especially a nylon filament fiber, which has higher strength to avoid the above-mentioned yarn breakage, untwisting, fraying, etc. Code is becoming more popular.

Usually, as the mop cord made of this nylon filament, a filament obtained by twisting nylon filaments and heat-treating them is used. Generally, filaments having a thickness of 10 denier or more are often used from the viewpoint of strength. To be

The above-mentioned nylon filament mop cords have higher strength than cotton yarn mop cords, and are excellent in durability such as fraying, untwisting and loosening, but have excellent durability. Therefore, it cannot be said that the performance is still sufficiently satisfactory as a rental mop cord yarn.

Further, synthetic fibers, especially nylon threads, are used as mop cords, and when repeated operations such as cleaning, washing and recycling, a phenomenon in which fused balls are generated on the fiber surface of the cord threads, It has the drawback that so-called pilling occurs. Pilling not only impairs the appearance and texture, but also causes unnecessary entanglement and entanglement of the cord thread, which impairs the cleaning function of the mop cord.

[0008]

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to improve all the above-mentioned drawbacks of the conventional cotton yarn mop cord, nylon filament mop cord, etc., and to break the cord yarn, untwist it, and loosen it. It is an object of the present invention to provide a rental mop cord which does not drop fibers, has excellent durability, has good dust adsorption and collection properties, has no pilling and has a good texture.

[0009]

According to the present invention, a plurality of spun raw yarns of crimped nylon staple fibers are twisted through a low melting point nylon fusion splicing yarn and the spun raw yarns are mutually interleaved through a fusion splicing yarn. In a rental mop cord formed by fusion bonding, the crimped nylon staple fiber has a single fiber fineness of 0.5 to 6 denier, a fiber length of 30 to 80 mm, and 5 to 4
There is provided a mop cord which is a staple fiber having a crimping rate of 0% and has a single fiber tensile strength suppressed to 6 gf / d or less in a cord state.

[0010]

The function of the mop cord of the present invention is as the main material fiber.
A fine crimped nylon staple fiber having a relatively fine single fiber fineness of 0.5 to 6 denier, a fiber length of 30 to 80 mm and a crimping rate of 5 to 40% is used. A mop cord is a yarn bundle obtained by adding a small amount of low-melting nylon fusion-bonded yarn to a book to combine the yarns, twisting the yarn, and fusing the spun raw yarns with each other by heating. And the tensile strength of the single fiber in the state of being the cord is suppressed to 6 gf / d or less by pretreatment such as immersion in a p-toluenesulfonic acid bath. Is a remarkable feature of.

Since the mop cord of the present invention uses relatively thin nylon staple fibers, it absorbs dust as compared with a mop cord made of nylon filament, particularly thick filament yarn. Good collection property. That is, as will be apparent by referring to the examples and tables described later, the mop cord of the present invention is almost comparable to the mop cord using the cotton thread which is said to be relatively excellent in dust trapping property. It shows excellent dust-collecting property, and is clearly superior in dust-collecting property to the mop cord of the comparative example made of nylon filament yarn.

Next, in the mop cord of the present invention, as described above, the specific crimped nylon staple fibers are combined and twisted, and the raw fibers are partially fused by the low melting point nylon fusion yarn to form a yarn bundle. Therefore, even if it is used for a long period of time as a mop, repeated steps such as use and washing regeneration,
It does not cause twisting or loosening of the yarn. Therefore,
The durability is remarkably superior to that of a mop cord made of cotton thread or the like.

Further, the mop cord of the present invention has the strength of the constituent fibers suppressed to a value of 6 gf / d or less as the tensile strength of the single fiber in the state of becoming the cord, so that the fiber strength becomes unnecessary. It is not too strong, it is used as a mop cord for a long time, and so-called pilling does not occur even if it repeats many cycles of use, washing, regeneration and the like.

Furthermore, the mop cord of the present invention is lighter in weight and bulkier than a cord made of cotton or the like,
One of the advantages is that the texture is excellent.

[0015]

The crimped nylon staple fiber used in the mop cord of the present invention is nylon 6, nylon 6,6, nylon 6,10, nylon 9, nylon 1
In addition to 1, 1, nylon 12, etc., any nylon staple made of paracyclohexyldiamine adipamito, etc. and various co-condensed polyamides, polyamide blends, etc. is used.

In the present invention, the crimped nylon staple has a single fiber fineness of 0.5 to 6 denier, preferably 0.5 to 4 denier.

When a fiber having a fineness of more than 6 denier is used, the dust-collecting property of the mop cord is inferior, and the mutual fusion of the raw yarns is slightly incomplete. It has a tendency to easily come loose and untwist. On the other hand, when the fineness is less than 0.5 denier, not only the cost becomes expensive, but also when the cord yarn bundle is used, the stiffness of the yarn bundle becomes slightly weak, and the followability at the time of use is a little. As it gets worse, thread breakage, entanglement,
Frequent occurrence of fraying and the like impairs durability and workability.

The staple used has a fiber length of 30 to 80 mm, preferably 30 to 70 mm. If the fiber length is less than 30 mm, it becomes difficult to combine and twist the yarn.
Also, the strength of the yarn bundle is reduced. On the other hand, when staples having a fiber length exceeding the above range are used, the washing durability is rather lowered.

The crimped nylon staple fiber of the present invention comprises
The following formula However, the crimp ratio defined by l ₀ : fiber length when crimped 1: fiber length when stretched is 5 to 40%, preferably 7 to 35%, and particularly preferably about 25% To use.

Fibers having a crimp ratio of less than 5% tend to cause the mop cord yarn bundles to be frayed or loosened during a recycling process such as washing, and thus have poor washing durability. On the other hand, when the crimp ratio exceeds 40%, not only the dimensional loss of the yarn bundle due to shrinkage increases but also the tendency of the yarn bundles to be entangled with each other increases.

A method known per se may be used for the crimping treatment, and the crimping treatment may be performed at any stage of the raw yarn, the compound yarn, and the yarn bundle after twisting, but it is usually at the stage of the tow (the raw yarn). Done.

In the present invention, a plurality of spun raw yarns of such crimped nylon staple fibers, usually several to ten or more, are combined, and a low melting point nylon fusible yarn is added to the spun raw yarns.
Twist the yarn. About 100 d to 200 d of the fusion-bonded yarn is usually added to 5315 d of the crimped nylon staple fibers.

The low melting point nylon fusible yarn has a melting point of 80 from the nylon resin material used for the crimped nylon staple fiber which is the main material fiber of the mop cord of the present invention.
Nylon yarn having a low melting point of about 120 to 120 ° C. is used and is appropriately selected depending on the type of staple fiber used as a main material. Normally, a fiber made of polyamide or copolyamide resin having a melting point of 100 to 120 ° C. is used, and particularly, plural kinds of fibers are used. A polyamide-forming monomer, that is, a copolyamide comprising a combination of an ω-aminocarboxylic acid component or a dicarboxylic acid component and a diamine component is preferably used.

A specific example of such a low-melting point copolyamide yarn is Flor # 1000 (trade name) sold by Unitika Ltd., for example.

The fineness of the low melting point nylon fused yarn is as follows:
A single fiber fineness of 5 to 20 denier, preferably 6 to 14 denier is used.

In the present invention, the degree of twisting of the fusion spun yarn-added compound yarn is usually 80 to 800 for the above compound yarn.
Twisting / m, in particular 100 to 600 times / m, undertwisting, and the twisting direction is opposite to that of undertwisting, and is less than the number of twists in the undertwisting and 50 to 300 times / m, especially 70 to 200 times It is preferable to have a twist number of / m. The number of upper twists is 1 than the number of lower twists
A value of 0 to 80 is advantageous for fixing the twist in connection with the fusion treatment described below.

When the number of times of twisting of the upper twist and the lower twist is less than the above range, the fixing of the twist becomes insufficient, and the tendency of the thread to be frayed or worn during repeated use increases. When the number of twists of the upper twist and the lower twist is more than the above range, the flexibility and freedom of the mop cord are lost, and dust collection and retention are reduced, and cleaning workability is reduced. In addition, the texture tends to deteriorate.

In the present invention, the twisted yarn is heat-treated to fuse the low melting point nylon fused yarn in the twisted yarn to partially fuse the spun raw yarns in the twisted yarn. The heat-bonding treatment temperature is appropriately set according to the types of the raw material crimped nylon filament and the fusible thread, the mixing ratio of the both, etc., but the melting point of the fusible thread or a temperature slightly higher than that is generally used. Is 100 to 120
It is about ℃. The fusion heat treatment is preferably carried out by blowing in steam, that is, in a steam atmosphere.

In the present invention, it is also an important feature that the single fiber tensile strength of the staple fiber is suppressed to 6 gf / d or less in a mop cord state, whereby the mop is used, Even when a cycle such as washing and recycling is repeated and used for a long period of time, generation of fused balls or the like on the mop cord yarn, that is, pilling is avoided.

The means for suppressing the tensile strength of the single fiber is not limited to this, but for example, a method of immersing the crimped nylon staple fiber in a p-toluenesulfonic acid-containing liquid can be adopted. . The conditions of this dipping treatment differ depending on the conditions such as the type of nylon fiber, the strength, the thickness of the fiber, etc., but in the case of nylon 6 or nylon 6,6 fiber of 1 to 4 single yarn denier, p-toluenesulfonic acid is usually used. About 60 in a solution having a concentration of 5 to 20% by weight
It is achieved by soaking for 1 to 5 minutes at a temperature in the vicinity.

A method known per se is used to form the mop cord. For example, the twisted yarn bundle of the present invention may be cut into a specific size and the center portion thereof may be sewn on a base fabric, or the yarn bundle may be formed. It is prepared by a method such as tacting on a base fabric as it is long and cutting it to an appropriate size at the same time.

Next, the performance of the cleaning rental mop equipped with the mop cord of the present invention will be further described based on the following examples.

[0033]

EXAMPLES Each test item and test method of the mop performance evaluation test carried out in Examples and Comparative Examples of the present invention are as follows.

(Dust Collection Test) Test Conditions Based on the results of analysis of cotton dust generated in general households by the Japan Spinning Inspection Association, cotton dust having the properties shown in Table 1 below was blended. Using the same mop shape and the same pile surface area, the dust collection property of each mop sample was evaluated.

[0035]

[Table 1]

Test Method Cotton dust was collected 130 times in 10 minutes by using a repeating tester. (Dust Collection) Next, the dust collected was subjected to an idle motion 130 times in 10 minutes. (Dust dispersion) In each test, the weight was measured and the difference was examined.

(Pile Abrasion Test) Dry Test 5 g of pile is precisely weighed and put in a 500 ml polyethylene container. 10 g of sea sand (Wako Pure Chemical Industries, 20-35 mesh) is put in this, and it shakes for 10 minutes with a horizontal shaker. Sea sand is carefully removed, washed with a neutral detergent using an ultrasonic cleaner for 3 minutes, and then rinsed twice for 1 minute. After drying in a dryer at about 50 ° C., the weight is measured. It is evaluated by the weight% of the wear weight (initial weight-weight after test) with respect to the initial weight of the pile. Wet test 5 g of pile is precisely weighed and put in a 500 ml polyethylene container. 10 g of sea sand and 5 ml of water were added to this, and thereafter, the same treatment and evaluation as in the dry test were carried out.

(Pilling Occurrence Evaluation Test) (1) Fiber Tensile Strength Measurement Test Single fibers were sampled from each mop cord sample immediately before use, and the tensile strength was measured based on the JIS L1015 chemical fiber staple test method. (2) Visual observation of the occurrence of pills The mop of each sample was used in the same way as a regular product (actual use period: 4 weeks), and after the washing and washing process cycle after use was repeated 10 times, the occurrence of pilling (hair) The presence or absence of bead generation) was visually evaluated.

[Example 1] The following crimped nylon staple fiber spun yarn, nylon 6 single fiber degree 1.5 denier fiber length 38 mm single fiber tensile strength 5.7 gf / d stretch 40% crimp rate 11% 10 % P-toluenesulfonic acid (PTS) solution,
Pretreatment was carried out by dipping at 60 ° C. for 3 minutes. The monofilament tensile strength of the treated raw yarn was 4.2 gf / d, and the elongation was 40%. On the other hand, as a low-melting nylon fusion-bonded yarn, Fluor M # 1000 (trade name) manufactured by Unitika Ltd. (100 denier, melting point 100 ° C.) was prepared and fused to two pre-processed crimped nylon staple strands (2S). A total of 3 yarns were added in the ratio of 1 yarn (100d), and were twisted under the following conditions to obtain twisted yarns. Upper twist 170 times / m Lower twist 200 times / m The above twisted yarn was heat-treated at 105 ° C. for 10 minutes in the presence of steam to fuse the individual yarns in the twisted yarn to form a fused yarn bundle. Next, the yarn bundle was cut into a length of 20 cm and the center portion was sewn to a nylon base fabric to obtain a mop fabric. The basis weight of the mop cloth was about 100 g / cm ² . This mop cloth was tested for dust collecting property, washing durability (pile abrasion test), and the presence or absence of pilling (fiber tensile strength test, pilling visual inspection). Table 2 shows the results.

Example 2 As crimped nylon staple fiber spun yarn, nylon 6,6, single fiber degree 1.5 denier, fiber length 38 mm, single fiber tensile strength 5.7 gf /
d, a crimp expansion rate of 11% was prepared, and the same low melting point nylon fused yarn as that used in Example 1 was used without performing pretreatment such as PTS treatment. Under the same conditions, the yarn was combined, and the upper and lower twists were added to form a twisted yarn. This twisted yarn was treated in the same manner as in Example 1 to form a fused yarn bundle, and using this, a mop cloth similar to that in Example 1 was produced and its performance was evaluated. Table 2 shows the results.

[Examples 3 and 4] A mop was prepared in the same manner as in Example 2 except that the crimped nylon staple fiber filaments used in Example 2 were replaced by those shown in Table 2. The performance was evaluated for each. Table 2 shows the results
Shown in

[Comparative Example 1] The following crimped nylon filament yarn was used in place of the crimped nylon staple fiber raw yarn of Example 2. Nylon 6,6 filament 1300 denier (136f) Tensile strength 3.1 gf / d Elongation 44% Crimping ratio 16% The same low melting point fusion yarn as that used in Example 2 was applied to the above crimped nylon filament. The above crimped nylon filament yarn was added at a ratio of 1 to 2 to obtain a multifilament yarn. (2600d) Next, this fusion yarn-added multifilament was twisted in the same manner as in Example 2 and further heat-treated to partially fuse filament fibers, and a mop cord yarn bundle was produced using this. Example 2
A mop cloth was treated in the same manner as above, tested in the same manner as in Example 2, and its performance was evaluated. Table 2 shows the results.

[Comparative Example 2] Cotton twisted composite yarn with the following specifications, single yarn count 1.5 count, single yarn twist number 200 times / m (bottom twist), 2 yarns twist number, 195 times / m (upper) (Twisting) to produce a cotton yarn bundle, which was mercerized to obtain a crimped yarn. Using this yarn bundle, make a mop cord yarn,
A mop cloth was produced by sewing the base cloth, and the evaluation test was performed in the same manner as in Example 1. Table 2 shows the results.

[Comparative Example 3] In Example 1, in Example 1
A mop cord was produced in exactly the same manner as in Example 1 except that the crimped nylon staple fiber raw material used in 1 was used as it was without pretreatment, and its performance was evaluated. Table 2 shows the results.

[Comparative Example 4] Nylon 6,6 fibers having the monofilament degree, fiber length, tensile strength, and crimp extension ratio of the crimped nylon staple fiber filaments shown in Table 2 were used. A mop cloth was prepared in the same manner as in Example 2 and its performance was evaluated. Table 2 shows the results.

[0046]

[Table 2]

[0047]

EFFECTS OF THE INVENTION Since the rental mop cord of the present invention has the above-mentioned structure, it is not only excellent in the dust absorption and collection properties and the texture and is lightweight, but also the cord yarn can be used for a long period of time. It has many outstanding advantages in that it has no twisting back, variations, and fibers do not fall off, it has excellent durability, and that pilling (pills) does not occur.

Claims (1)

[Claims] 1. A rental mop cord formed by twisting a plurality of spun raw yarns of crimped nylon staple fibers through a low melting point nylon fusion splicing yarn and fusing the spun raw yarns together through the fusion splicing yarn. In the above, the crimped nylon staple fiber has a single fiber fineness of 0.5 to 6 denier and 30 to 80 m
A mop cord which is a staple fiber having a fiber length of m and a crimping rate of 5 to 40%, and has a single fiber tensile strength suppressed to 6 gf / d or less in a cord state.