JPH048546B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to garment treatment products, and more particularly to garment treatment products based on garment treatment agents that can be transferred to the garments upon contact with the garments in a laundry dryer. The present invention relates to a clothing processing product that can impart antistatic properties, flexibility, etc. to clothing. [Prior Art] A laundry dryer is generally a rotating drum type, and blows hot air into the rotating drum to give rotational motion to the clothes, thereby removing residual moisture contained in the clothes after washing. be. Therefore, the clothes are subjected to considerable friction within the dryer, generating a large amount of static electricity, and when a hand is placed into the rotating drum to remove the clothes, an electrical discharge phenomenon occurs, giving an electric shock to the operator. In addition to the above-mentioned shock, the generation of static electricity also causes phenomena such as clinging when putting on and taking off dry clothes, and adhesion of dust and the like. Furthermore, it is desirable that the clothing be finished with smoothness, soft texture, and flexibility. From this point of view, clothing processing agents are applied to clothing during drying to prevent the generation of static electricity and to impart flexibility to clothing. One method is to put a garment treatment product in which a garment treatment agent is supported on an elastic substrate into a dryer together with the clothes to be dried and tumble to transfer the garment treatment agent to the clothes. A method has been reported (U.S. Patent No.
No. 3442692). Clothes processing products used in this method include Japanese Patent Publication No. 47-19594 and Patent Publication No. 47-19594.
−40120, and the former has 5.5 to 12
A product impregnated with two or more mutually compatible textile softeners in an absorbent base layer having an absorbent capacity of It has been shown that 40% of the loaded textile softener is transferred to the garment, and the latter involves coating the paper or woven or non-woven fabric with a substantially solid wax-like matrix on which the agent containing the textile softener is applied. It is stated that upon use of the product in a clothes dryer, 80% of the drug is transferred to the clothing by coating on the outside of the solid in contact with the substrate coating. [Problems to be solved by the invention] However, although the clothing processing product described in the above publication is effective when using a dryer made in the United States, it is not sufficiently effective when used in a dryer made in Japan. Not done. In other words, electric dryers made in the United States generally have a heater capacity of 4,600 W to 5,600 W, an air flow rate of 3 to 5 m ³ /min, are operated at an average temperature of 74°C, and remove approximately 4.5 kg of moisture from clothing per hour. can be removed more easily. On the other hand, Japanese-made dryers are generally electric dryers, with a heater capacity of approximately 1200W and an air flow rate of approximately 2m ³ /min.
It operates at an average temperature of about 60°C and can remove about 1.8 kg of moisture from clothing per hour. This difference causes a big difference in the expression of the effect of the clothing processing product, and when the clothing processing product described in the above publication is mixed with clothing in a dryer made in the United States, the product carries the load. 70-80% of the processing agent is transferred to the clothing, but when the clothing processing product is mixed with the clothing in a Japanese dryer, only 30-50% of the processing agent is transferred to the clothing. That is, during the operation of the dryer, the processing agent supported by the clothing processing product is substantially solid at the beginning of the operation, but when heated thereafter, it is eluted and transferred to the clothing. However, in Japanese-made dryers, the clothing temperature during operation is 10 to 15 degrees Celsius lower than in American-made dryers, so the treatment agent remains solid until the late stages of operation, and only begins to dissolve for the first time near the end. However, sufficient effects cannot be obtained. The base of conventional clothing treatment products uses a nonwoven fabric made of hydrophobic fibers with a circular cross-sectional shape.
However, as mentioned above, when used in a Japanese-made dryer, a sufficient transfer rate of the processing agent to clothing cannot be obtained, so the melting point of the processing agent must be lowered, and there are restrictions on the composition of the processing agent. was also received. Furthermore, conventional nonwoven fabrics have the disadvantage that fibers fall off from the substrate during tumbling. [Means for Solving the Problems] Therefore, the present inventor conducted intensive research to overcome the above drawbacks and provide a clothing processing product suitable for Japanese-made dryers, and as a result, developed a product that mixed flat fibers. The present invention was completed based on the discovery that a nonwoven fabric could be used as the substrate. That is, the present invention provides a garment treatment product in which the substrate carries a garment treatment agent that can be transferred to the clothes by contact with the clothes in a laundry dryer, and the substrate has hydrophobic fibers that account for 50% by weight of the total fibers. With the above, the basis weight is 10~
A product for clothing processing, which is a nonwoven fabric of 30 g/m ² and is characterized by 50 to 60% by weight of fibers with a circular cross-sectional shape and 10 to 50% by weight of fibers with a flat cross-sectional shape. It provides: The most important requirement for the garment treatment product of the present invention is the structure of the substrate; even if the temperature of the clothes in the dryer is lower than the melting point of the garment treatment agent, the treatment agent may be transferred to the garment depending on the structure of the substrate. can be done. In the present invention, the nonwoven fabric serving as the base must contain hydrophobic fibers at least 50% by weight of the total fibers. The hydrophobic fiber is preferably one or more of polyester, polyolefin conjugate fiber, or polypropylene fiber (PP), but nylon, acrylic fiber, etc. may also be used. Hydrophobic fibers such as rayon may also be used, but it is not preferred that the proportion of hydrophilic fibers exceeds 50% by weight. When melt-spinning hydrophobic synthetic or semi-synthetic fibers, a spinneret is used, and the cross-sectional shape of the resulting fibers varies depending on the shape of the spinneret. For example, if a circular or crescent-shaped die is used, fibers with a circular or hollow circular cross-section can be obtained. A die for obtaining flat fibers is described in Japanese Patent Application Laid-Open No. 62-50567. In the present invention, a cross-sectional shape having a circular shape refers to a shape such as a circle, a hollow circle, or a confetti-like shape, and the ratio of the short axis to the long axis is close to 1/1. Further, the term "flattened fibers" refers to fibers having a ratio of the short axis to the long axis of 1/2 to 1/6. If the amount of flat fibers is less than 10% by weight of the entire substrate, the fibers may fall off during use and may contaminate clothing. Basis weight is related to strength and drug carrying capacity. Even if the transfer rate of the clothing processing agent is good, it is necessary to avoid situations in which the clothing is torn during drying or the carrying capacity of the clothing processing agent is weak, making it impossible to carry a sufficient amount of the processing agent to fully demonstrate its performance. There is. For this purpose, the substrate needs to have a certain degree of dense structure,
A suitable range is a basis weight of 10 to 30 g/m ² . Methods for making such nonwoven fabrics are well known in this technical field and do not form part of the present invention, but in view of ease of fabrication, nonwoven fabrics with preferable characteristic values can also be made using a dry process; The wet method is simpler. A nonwoven fabric that satisfies the above conditions exhibits a high transfer rate even under the conditions of a Japanese dryer, carries a sufficient amount of chemicals to exhibit properties such as flexibility and antistatic properties, and is capable of supporting the substrate during drying. It is an excellent substrate that does not cause any inconveniences such as tearing or spot stains on clothing. Known methods can be used to support the clothing treatment agent on such a substrate, and preferred examples include a dipping method in a bath, a spray method, and a printing method. Depending on the processing agent used and the method of supporting it, due to handling issues, it may be possible to dilute the processing agent with a volatile solvent, such as isopropanol or ethanol, and remove the solvent after supporting it on the substrate. can. In the present invention, the clothing treatment agent supported on the substrate is not particularly limited, and known agents generally known as "softeners" and the like can be used. Preferred are mono- or di-long chain alkyl ammonium salts. As a mono long chain alkyl ammonium salt,
The following formula (1) is used. [In the formula, R represents an alkyl group having 8 to 22 carbon atoms, R ₁ to
R ₃ is a benzyl group, an alkyl group having 1 to 3 carbon atoms, or a -(CH ₂ CH ₂ O) _o -H group (n is a number from 1 to 10)
, X is chloride ion, methyl sulfate ion,
Anion such as ethyl sulfate ion, glycolate ion, para-toluenesulfonate ion, etc.] Preferred examples of the mono long-chain alkyl ammonium salt represented by formula (1) include beef tallow trimethylammonium salt, tetradecyltrimethylammonium salt, etc. salts, dodecyltrimethylammonium salts, and preferred salts include chloride, methosulfate, and ethosulfate. As the long-chain alkyl ammonium salt, one represented by the following formula (2) is used. [In the formula, R ₁ , R ₂ , R ₃ and Examples include ethoxyammonium salts, and preferred salts include chloride, methosulfate, and ethosulfate. In addition to the above-mentioned components, the clothing treatment agent may contain nonionic surfactants, optical brighteners, fragrances, silicones to facilitate ironing, and the like. It is preferable that the garment treatment product in which the garment treatment agent is supported on the base as described above be sold in the market in a size for one use or as a roll containing a sewing machine size for each use. For example, it is preferable to use about 300 to 800 cm ² per 1 kg (dry weight) of laundry. [Examples] Next, the present invention will be explained with reference to Examples, but the present invention is not limited to these Examples. Example 1 Various nonwoven fabrics shown in Table 1 were prepared, and a drug consisting of 5 parts of mono-cured beef tallow trimethylammonium methosulfate, 20 parts of di-cured beef tallow dimethylammonium methosulfate, and 75 parts of sorbitan monostearate was added per 1 m ² of the nonwoven fabric. Impregnate it to 20g and cut it into 20 x 25 (cm).
This was used as a test sample. About this sample:
The dye transfer rate of the clothing treatment agent and the shedding of fibers from the substrate were investigated. The nonwoven fabric serving as the substrate was prepared by a wet method using a circular wire/Yankee type paper machine. The results are shown in Table 1. <Test method> Dye transfer rate of clothing treatment agent: A cotton towel with a dry weight of 1 kg (approximately 2 kg at the end of dehydration of the washing cycle) was used with the test sample in a Toshiba clothes dryer ED-360G with a heater capacity of 1200 W and drying time. It was dried for 60 minutes. Dye migration rate = initial test sample weight - test sample weight after drying / amount of drug in initial test sample (1.0 g) x 100 The molecular term is defined as the amount of dye migration per 1 kg of cloth. Ability of fibers to come off from the substrate; dry weight 1 using Toshiba clothes dryer ED-360G
A cotton black cloth (size 20 x 30 cm) weighing 1.7 kg (approx. 1.7 kg at the end of the dehydration cycle) was dried together with the test sample under conditions of a heater capacity of 1200 W and a drying time of 2 hours. After drying, the cotton black cloth was visually judged by 10 female panelists, and the number of fallen fibers was evaluated in two stages. Evaluation criteria ○: Almost no fallen fibers ×: Many fallen fibers As can be seen from Table 1, garments with too large basis weight or with less than 50% by weight of hydrophobic fibers have a poor dye transfer rate with clothing treatment agents. In addition, in the case of using only hydrophobic fibers having a circular cross-sectional shape, the fibers often fall off from the substrate, and both are unsatisfactory. In comparison, the product of the present invention was excellent in both dye transfer rate and fiber shedding property. 【table】

Claims (1)

[Claims] 1. Clothing treatment products in which the substrate carries a clothing treatment agent that can be transferred to clothing upon contact with the clothes in a laundry dryer, where the substrate contains hydrophobic fibers in an amount of 50% by weight or more of the total fibers, and A nonwoven fabric with a weight of 10 to 30 g/ ^m2 and a circular cross-sectional shape of fibers.
50 to 90% by weight, 10 with flat fiber cross-sectional shape
A garment treatment product characterized by ~50% by weight.