JPH0788614B2 - Insect repellent base material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION {Industrial field} The present invention relates to an insect-proof filling base material used for batting of futons and cushions.

{Conventional technology} Traditionally, futons, cushions, etc. have been hotbeds for mites. The number of Futon is said to be 200,000 to 300,000. Many mites are killed by sun-drying and washing, but increase immediately after being worn. In order to prevent this, it has been proposed to add a mites-proofing agent to the fibers to make a futon or cushion. However, there is a problem in washing and durability, and when the futon is washed with water or dry to keep it clean, there is a problem that the anti-mite agent falls off and its effect disappears. In order to solve this, in the case of synthetic fiber, it may be possible to discharge with a drug during spinning, but not only the performance of the fiber deteriorates, but the drug dispersed in the center of the fiber appears on the surface. And does not work as an anti-tick agent. Therefore, it is necessary to use a large amount of expensive medicine.

{Problems to be Solved by the Invention} An object of the present invention is to solve the above problems, and to provide an inexpensive insect-repellent filling base material which can impart sufficient durability.

{Means for Solving the Problems} The configuration of the present invention that achieves the above object is as follows. That is, a wadding base material composed of a single or a plurality of kinds of fibers, at least one kind of which is a core-sheath structure fiber whose sheath part is composed of a high molecular polymer having a lower melting point than the core part, The fiber is a fiber having a higher melting point than the sheath portion, the core-sheath structure fiber alone or a mixture of a plurality of types of fibers, the core-sheath structure fiber, or other fibers, or both fibers to prevent mites The insect-proof filling base material is characterized in that the medicine to be provided is applied and the medicine is protected by dissolution of the high-melting polymer having a low melting point in the core-sheath structure fiber. Furthermore, it is a wadding base material composed of a single kind or a plurality of kinds of fibers, and at least one kind is a core-sheath structure fiber whose sheath part is composed of a polymer having a lower melting point than the core part, The fiber is a fiber having a higher melting point than the sheath portion, and the core-sheath structure fiber alone or a mixture of a plurality of types of fibers, the core-sheath structure fiber, or another fiber, or both fibers have a tick-proof property. With the drug given,
An insect-repellent filling base material having a laundry mite prevention rate of 50% or more.

However, the laundry mite prevention rate (%) = {(pre-wash mite repellent rate−post-wash mite repellent rate) / pre-wash mite repellent rate} × 100 Hereinafter, the present invention will be described in more detail.

The sheath portion of the fiber constituting the core-sheath is composed of a high molecular weight polymer having a lower melting point than the core portion, and specifically, the high molecular weight polymer of the sheath portion is 180 ° C. or lower at 90 ° C. or higher. Those that melt and flow are desirable. If the temperature exceeds 180 ° C., enormous energy is required during processing, and if it is too low, it is easily melted at ambient temperature during practical use, which is not preferable. Preferably 100
℃ ~ 150 ℃. The material may be polyethylene, polyester, polyamide, polypropylene or the like. The cross-sectional area ratio of the core to the sheath is preferably 10 to 90%.

On the other hand, the fibers to be mixed may be any fibers such as natural fibers and synthetic fibers as long as they have a melting point higher than that of the sheath portion.

It is necessary that a core-sheath structure fiber, a normal fiber, or a drug having both fiber repellent properties is added. After the two fibers have been mixed, they are treated at a temperature above the melting point of the sheath and dissolved, whereby the drug applied to the fiber surface is protected by the dissolved polymer. The anti-mitic agent attached to the fiber may have sufficient adhesive strength to withstand the mixing and spinning action.

The method of attaching the anti-mite agent to the fiber surface is a spray method,
Either the dipping method or the kiss roller method may be used, but it is preferable to select the simplest means possible. The anti-mite agent can be applied alone or in a mixture with an oil agent, a synthetic resin or the like.

As a kind of anti-mitic agent, diphenyl ether type, quaternary ammonium salt type, organic iodine type, biguanide type, organic phosphorus type drug, etc. can be used. Highly effective ones are good.

The higher the tick repelling rate, the better, but at least 20% is required, and the effect is actually seen in more than 30%. Higher ones require a large amount of drug, which is disadvantageous in terms of cost and safety, but if the market demands it, it is technically possible up to 100%.

The repelling rate of ticks is measured by the following method.

A sample A to be measured and a control (sample to which no anti-tick agent is attached) B are placed on a petri dish, and mite feed is placed on this. Keeping the room temperature at 25 ℃ × 90 ℃ RH, put a few thousand mites into a petri dish and leave it for 90 hours. After that, the number of mites that have penetrated into the feed is read for both A and B. The tick repellent rate is calculated by the following formula.

Repellent rate (%) = {(number of ticks in B-number of ticks in A) / number of ticks in B} × 100 After mixing and opening the core-sheath structure fibers or other fibers to which a tick-proof agent is added, It heat-processes as a layer and completes the filling base material of this invention. A conventionally known method can be applied to the method of blending and opening the fibers. For example, after stacking in a sandwich shape and passing through a cotton opening machine, make it into a sheet shape with a card machine,
A method in which this is layered in layers, a method using a random webber, a bag-like material prepared in advance after opening, or a method of laminating in a frame by an air flow can be applied. Which method is adopted may be appropriately selected according to the application. The sheathed fiber is melted by steaming or dry heat the completed layered fiber to protect the acaricide. The temperature at this time is 20 to 60 ° C. higher than the melting completion temperature of the sheath. That is, if the melting temperature is 110 ° C, it is preferable to carry out at a temperature of 130 to 170 ° C. To improve efficiency, steaming is good, but in the case of dry heat, hot air blowing or suction is preferable. In the above case, about 1 minute to 3 minutes is sufficient. In the method of blowing the air into the metal frame by the air flow, the heat energy is absorbed by the metal, so that it is necessary to considerably lengthen the time. Specifically, it takes 3 to 5 times longer than the above method.

Even for finished products, at least 30% by the above repelling rate measurement method
The above is enough.

When the core-sheath structure fiber is provided with an anti-mite agent, the mite-preventive agent and the dissolved fiber tend to concentrate at the contact points of the monofilaments forming a layer, and the anti-mite agent is applied to fibers other than the core-sheath fiber. Even when the agent is applied, there is some tendency.

Next, the configuration of the present invention will be further described based on the embodiments shown in the drawings.

FIG. 1 is a cross-sectional view of a single fiber treated with a conventional anti-mitic agent surface, in which the anti-miticant agent 2 is attached to the surface of a fiber 1.

FIG. 2 is a cross-sectional view of a single fiber obtained by the conventional fiber kneading method, in which the mite-preventing agent 4 is blended in the fiber 3,
This fiber has a small chance that the anti-mite agent will appear on the surface of the fiber.

FIG. 3 is a cross-sectional view of the core-sheath composite structural fiber constituting the filling base material according to the present invention, in which the fiber surface of the single fiber 5 constituting the core is coated with the dissolved polymer 7 constituting the sheath. However, since the mite prevention agent 6 is mixed in this, the chance of contact with the outside increases.

In the present invention, the presence of the monofilament 5 constituting the core allows the physical properties of the fiber to exhibit independent performance without being influenced by the anti-mitic agent, and the anti-mitic agent is protected by the dissolved polymer. Further, it can be used as a tick-proof filling base material of the present invention, which does not fall off due to external force such as washing. As for the protection of the anti-mitic agent, in addition to previously applying the anti-miticating agent to the core-sheath structure fibers, as described above, it may be applied to the fiber surface other than the core-sheath structure fibers. In this case, it is also possible to dissolve the polymer in the sheath portion in the state of the mixture of the fiber to which the mite-preventive agent is added and the core-sheath structure fiber.

The insect repellent base material of the present invention preferably has a mite repellency rate of 50% or more before washing, and a laundry mite prevention rate of 50% or more. It should be noted that the mite prevention rate (%) = {(pre-wash mite repellent rate-post-wash mite repellent rate) / pre-wash mite repellent rate} x 100.

Example 4 denier with a sheath melting temperature of 110 ° C. of a polyester-based core-sheath structure fiber, 51 mm staple fiber (without addition of an anti-mite agent), and a diphenyl ether type by a spray method at the time of spinning on a normal polyester fiber After mixing 6 denier and 64 mm of mite-proof fiber with 0.5% of chemicals in a ratio of 20:80, open with a card machine and stack in layers, then 155
Sample 1 of the product of the present invention was prepared by passing it through a hot air blowing-suction type dryer for 2 minutes.

Also, the mite-proof fiber and 6-denier, 64 mm normal polyester fiber not subjected to mite-proof treatment were similarly used in a ratio of 20:80.
Samples of conventional product 2 were prepared by mixing cotton in the ratio of, and opening and laminating with a card machine.

Furthermore, a diphenyl ether compound is added to
% Re-ester fiber 6 denier and 64 mm staple fiber obtained by blending, drawing and stretching were opened by a card machine and laminated to prepare a conventional sample 3.

As a control, a commercially available unprocessed polyester fiber 6 denier, 64 mm laminated sample product, which has been conventionally used, was prepared.

Sample 1 and control are placed on the first petri dish, sample 2 and control are placed on the second petri dish, sample 3 and control are placed on the third petri dish, and fish meal, cereal flour, and vitamins, which are mites, are mixed on each sample. Place 1g of the sampled product, and add 5000 mite mites in each petri dish.
The animals were placed in a cub and kept at a temperature of 25 ° C and a humidity of 90% for 90 hours. After that, the number of Physcomitrella patens in the food placed on each sample was read. The repellent rate was calculated by the calculation formula described in this book.

Further, the sample was subjected to laundry washing three times and then subjected to a repellent test in the same manner. The respective results are shown in Table 1.

Before washing, the repellent rate of the conventional product of Sample 2 is high,
Next, the product of the present invention has a bad result in the conventional sample 3, but after the washing test, the product of the present invention is the best and shows that the mite-preventing effect is not deteriorated by washing.

The washing method is 2g / as a detergent and 40 with an electric washing machine.
The mixture was put in a mesh bag for 5 minutes at ℃, washed, rinsed, and then naturally dried.

[Brief description of drawings]

FIG. 3 is a cross-sectional view of the core-sheath composite structural fiber that constitutes the filling base material according to the present invention. FIG. 1 is a cross-sectional view of a single fiber treated with a conventional surface treatment for acaricide. FIG. 2 is a sectional view of a single fiber obtained by a conventional fiber kneading method. 1,3,5: Fiber 2,4,6: Acaricide 7: Sheath polymer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 62-159692 (JP, A) JP 62-127097 (JP, A) Actual 61-113842 (JP, U) Actual 63- 167192 (JP, U) JP 62-27831 (JP, B2)

Claims (2)

[Claims] 1. A batting base material composed of a single fiber or a plurality of types of fibers, at least one type of which is a core-sheath structure fiber whose sheath portion is made of a polymer having a lower melting point than the core portion. , The other fiber is a fiber having a higher melting point than the sheath portion, and the core-sheath structure fiber alone or a mixture of plural kinds of fibers, the core-sheath structure fiber, or the other fiber, or both fibers of the mite A repellent-filled base material, which is provided with a repellent agent and is protected by dissolution of the high-melting polymer having a low melting point in the core-sheath structure fiber. 2. A batting base material composed of a single kind or a plurality of kinds of fibers, at least one kind of which is a core-sheath structure fiber whose sheath part is composed of a polymer having a lower melting point than that of the core part. The other fiber is a fiber having a melting point higher than that of the sheath portion, and the core-sheath structure fiber alone or a mixture of a plurality of types of fibers is used, and the core-sheath structure fiber, the other fiber, or both the fibers are protected against mites. With a drug that has sex,
An insect-repellent filling base material having a laundry mite-proof rate of 50% or more. However, the mite prevention rate (%) = {(pre-wash mite repellent rate-post-wash mite repellent rate) / pre-wash mite repellent rate} x 100