JPS5860068A - Surface modifier of nonwoven fabric for sanitary material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surface modifier for nonwoven fabrics for sanitary materials made of synthetic fibers, cellulose fibers, or blended fibers thereof. This invention relates to a surface modifier that can increase the iron water velocity of nonwoven fabrics for materials, reduce residual liquid, and improve the texture.

Generally, surfactants are treated as fiber finishing agents on cotton, yarn, woven fabrics, and knitted fabrics to improve flexibility, antistatic properties, smoothness, permeability, etc. As a surface modifier for nonwoven fabrics for sanitary materials made of fibers, no modifier that can fully satisfy the required performance for dormitory properties has yet to be found.

Sanitary materials such as disposable diapers and napkins are composed of nonwoven fabrics, absorbent materials, and waterproof sheets. Non-woven fabrics come into direct contact with the skin, and from a practical and hygienic perspective, the absorption rate of liquid into the absorbent material is high, the amount of liquid remaining is small, the absorbed liquid does not return, and it feels good on the skin. This is something that must be met as a required performance.

Furthermore, in the process of manufacturing nonwoven fabrics, there are self-adhesive methods, adhesive bonding methods, and interlacing bonding methods as methods for constructing nonwoven fabrics, and modifiers for nonwoven fabrics are required to not change in quality during these processes. be done.

However, although the performance that such nonwoven fabrics for sanitary materials should possess has been recognized in the past, it has not always been adequately addressed, and only a few improvements have been made.

For example, non-woven fabrics treated with non-ionic surfactants have a good water absorption rate immediately after treatment, but the water absorption rate deteriorates due to slight change in water absorption rate.Furthermore, sorbitan ester, which has no oral toxicity, is used in non-woven fabrics for food, but non-woven fabrics for sanitary materials The properties required for practical use as a surface modifier are insufficient.

The present inventors focused on the performance of surfactants based on the practically required characteristics of nonwoven fabrics for sanitary materials, and conducted various experiments by treating nonwoven fabrics with aqueous solutions of various ellipsoidal surfactants to produce sanitary fabrics that meet the above-mentioned required performance. As a result of intensive research to obtain a JX agent for surface modification of nonwoven fabrics for materials, by treating a certain surfactant with a nonwoven fabric made of synthetic fibers, cellulose fibers, or blended fibers thereof, we have created an endogenous material processed with the nonwoven fabric. It was discovered that this product has excellent practical properties in terms of the absorption rate of artificial filth bathing liquid into the absorber, the amount of artificial filth bathing liquid remaining on the nonwoven fabric, the texture of the nonwoven fabric, and resistance to light changes. The invention was completed.

That is, the present invention provides one or two selected from the group consisting of carboxybetaine, sulfobetaine, alkylbenzene sulfonate, alkyl sulfate, alkene sulfonate, and hydroxyalkyl sulfonate containing a hydrocarbon group having 10 to 50 carbon atoms. The present invention provides a surface modifier for nonwoven fabrics for sanitary materials made of synthetic fibers, cellulose fibers, or blended fibers thereof, characterized in that the present invention contains at least one type of synthetic fiber or cellulose fiber.

The following compounds can be mentioned as surface modifiers for nonwoven fabrics for sanitary materials according to the present invention.

2-alkyl-1-carboxymethyl-1-hydroxyethylimidazolinecumpetaine, N,N-dimethyl-N-furkyl-N-carboxymethylammonium betaine, N,N-SchiffAzkylannoalkylenecarboxylate, N, N,N-trialkyl-N-sulfoalkylene ammonium betaine, alkali metal salt of alkylbenzenesulfonic acid, alkali gold alkyl sulfate Jl [
, alkenesulfonate alkali metal salts, hydroxyalkylsulfonic acid alkali metal salts.

Among these, those having a bulk hydrocarbon group having 14 to 18 carbon atoms are preferred, and betaine compounds are particularly preferred.

When these surface modifiers are processed into nonwoven fabrics for sanitary materials, they are treated in the form of an aqueous solution by a method such as a dipping method, a pad method, a spray method, or a roller coater method. In addition, when treating cotton for nonwoven fabric, it is treated in the form of an aqueous solution by a dipping method, a spray method, or the like.

In carrying out the present invention, it is preferable that these surface modifiers are treated so that they adhere to the fibers at a weight of 0.05 to 2.0.

The present invention will be explained in more detail below using Examples.

In the Examples, the performance of the surface modifier was determined by the following method.

(Permeation time and remaining amount of liquid) As shown in Fig. 1, a multi-hole petri dish 4 is placed on an absorbent material in which an absorbent body 3 is covered with a nonwoven fabric 1 treated with various treatment agents and a back sheet 2. Simulated blood 50c at 50℃
Pour c.

The time until the simulated blood disappeared from the petri dish was measured and defined as the penetration time (seconds).

After 1 minute, remove Petri dish 4, leave it as it is for 4 minutes, and then place 5 sheets of 440P paper on top of nonwoven fabric 1.
Then, gently place a certain load on it and leave it for 30 seconds.

The weight increase of stacking five sheets of No. 44 paper was weighed, and this weight was used as the remaining liquid cover (xlo P).

Relationship between remaining liquid amount, penetration time, and practical performance Liquid remaining lid: A large amount of remaining liquid on the nonwoven fabric causes a sticky feeling that is extremely unpleasant. The relationship between the amount of remaining liquid and discomfort is such that if s x +o''''1 or less, there is no discomfort.

Penetration time: The longer the penetration time, the more discomfort the product will cause, and in addition to being absorbed into the absorbent material, it will leak to other areas and cause discomfort. The relationship between penetration time, leakage, and discomfort is as short as possible, preferably 3 to 4 seconds or less, so that there is no discomfort due to leakage to others.

(Skin Texture) Five panelists evaluated the texture of the nonwoven fabric after treatment.
Judgment was made based on the criteria listed below. Ratings in Tables 1 and 2 are 5
This is an evaluation that involves a lot of human judgment.

◎ Soft and smooth texture with no stickiness ○ Soft and smooth texture with a slight stickiness Δ It feels sticky and soft × Fairly rough and hard and feels strange against the skin × ×Example Rouyon/polyester/thermocompression-adhesive fiber m (Imperial weight ratio 15/4)
0/45) for sanitary materials (fabric weight 20-5
Table 1 shows the performance when 0.2% by weight of the various treatment agents shown in Table 1 were attached to the surface (0977 m2).

From the results shown in Table 1, it is clear that the compounds of the present invention are excellent as surface finishing agents for nonwoven fabrics for sanitary materials.

In addition, from the practical characteristics, a treatment agent having a residual liquid amount of 5×10 9 or less, a penetration time of 4 seconds or less, and a texture of rank Q to 0 has desirable properties as a surface modifier for nonwoven fabrics for sanitary materials.

There is less residual liquid, so there is less discomfort with Japanese clothes, the penetration time is short, there is less leakage to other areas, and the texture of the desk is good, so it adapts well to the skin.

Example 2 Rayon/polyester/thermocompression bondable fiber (stack ratio 15/
40/45) for sanitary materials (fabric weight 20-5
Table 2 shows the results of applying 0.2% by weight of various treatment agents shown in Table 2 to 0P/lll2) and examining the changes over time under condition F at 55°C.

From Table 2, it can be seen that the product of the present invention shows no change in performance when administered orally, and is excellent as a surface modifier for nonwoven fabrics for sanitary materials.

Example 3 Table 3 shows the performance when the treatment agent was applied to the nonwoven fabric in an amount of 0.05 to 2.0% by weight under the same treatment conditions as in Examples 1 and 2.

Treatment agent A: POIC lauryl ether (P-6) Treatment agent B: 0110150 oxo alcohol sal 7ate soda Treatment agent o: N,N-dimethyl-N-sudearyl-N
- Carboxymethyl ammonium betaine From Table 3, products B and O of the present invention have excellent performance as surface modifiers for nonwoven fabrics for sanitary materials because stable performance can be obtained even when the amount of adhesion is varied. I understand that.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the penetration time measuring device used in the examples. 1... Nonwoven fabric, 2... Back sheet, 5... Absorbent body, 4... Multi-hole chanelette applicant's representative. Kaoru Furuya Figure 1

Claims (1)

[Claims] One or more selected from the group consisting of carboxybetaine, sulfobetaine, alkylbenzene sulfonate, alkyl sulfate*tx, alkene sulfonate salt, and hydroxyalkyl sulfonate having a hydrocarbon group having 10 to 30 carbon atoms. A surface modifier for nonwoven fabrics for sanitary materials comprising synthetic fibers, cellulose fibers, or blended fibers thereof.