JPS5988902A - Diaper based on polyester fiber - 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 In general, for diapers, water absorption is the first required characteristic, and water retention is the second required characteristic. In order to satisfy these two most important properties for diapers, for example, a hydrophobic coating is formed on a web made of hydrophilic fibers, and the density and stitches of the web are limited to a specific range (Japanese Patent Application Laid-Open No.
-158451), an absorbent article consisting of a fiber mass with high liquid transferability and a fiber mass with high liquid retention property, and which have different densities and thicknesses (Japanese Patent Application Laid-open No. 158451).

52-84040), an absorbent product containing the general formula (Japanese Patent Publication No. 49-44757)
(Japanese Patent Application Laid-open No. 1982-60282), absorbent articles containing water-miscible substances such as polyethylene oxide fuyo (Japanese Patent Application Laid-Open No. 1982-60282), absorbent pads carrying crosslinked polyacrylamide, crosslinked sulfonated polystyrene, etc. 52-3
No. 1113), non-woven diapers treated with potassium salts of linear alkyl phosphates having 12 to 22 carbon atoms (Japanese Unexamined Patent Publication No. 56-58001), absorbent articles containing a superabsorbent polymer fixed layer Japanese Patent Publication No. 57-35001) etc. have been disclosed so far, but in the conventional technology, the material of the diaper is mainly a non-woven fabric sheet,
Many of them are subjected to chemical processing as described above or physical processing such as embossing. On the other hand, the present invention has constructed a diaper from a completely different perspective from the conventional technology, and its percent characteristics include the use of a polyester bulky yarn knitted fabric, and the fact that the knitted fabric has molecular weight! 500-10
,000 polyester/polyether block copolymer is applied and subjected to hydrophilic treatment, and two or more treated knitted fabrics are laminated and the periphery is bonded. That is, the present invention provides a structure in which two or more knitted fabrics having a coating containing a polyester/polyether block copolymer having a molecular weight of 500 to 10,000 and made of bulky processed polyester yarn are laminated, and the periphery of the laminate is A super absorbent diaper formed by combining the two.

Polyester/polyether block copolymer is a molecule H5oo-10,000 obtained by copolymerizing dicarboxylic acid components such as terephthalic acid and inphthalic acid, diol components such as ethylene glycol and butylene glycol, and polyfulkylene glycol. It is a polyester/polyether block copolymer.

- To form a coating of a polyester/polyether block copolymer on cloth, a conventionally known method may be used, but for example, by dissolving the coelectric polymer in a solvent,
It may be applied by spraying or dipping, followed by drying and heat setting. Alternatively, a knitted fabric may be immersed in an aqueous dispersion (emulsion or suspension) of the copolymer and then subjected to submerged heat treatment at a temperature at which dispersion is destroyed and aggregation occurs. u-C>o-(C
H,C)120). -8o, M, R~ Kano (CH,
CH2O\ (where R is an alkyl group, M is H or -N
H.

An alkali metal (n is 4 to 20) or a primary ammonium phosphate salt, a secondary ammonium phosphate salt, an ammonium sulfate salt, etc. may be added in an amount of about 0.slt/l.

As the positive ester, polyethylene terephthalate, polybutylene terephthalate, polyester modified with inphthalic acid, or a copolymer thereof can be used. The manufacturing method of the prize-finished yarn is also not particularly limited.

A conventionally known bulking method may be used.

The diaper of the present invention is made by laminating two or more knitted fabrics and bonding the periphery of the laminate.

Methods for joining the surroundings include sutures, adhesive bonding,
Methods such as fusion by suturing with heat-fusible fibers and then heat-pressure treatment, or engagement using Velcro (trademark), etc., can be used, but the elasticity, knitting density, crimpability of the knitted fabric, etc. can be used. You can choose an appropriate method. The shape of the laminate may be cut into any shape, such as an ellipse or a rectangle, depending on the purpose.

In addition, in the present invention, when forming a polyester/polyether Plutsch copolymer coating on a knitted fabric, it may be treated on a plain or dyed fabric, but when it is treated in a liquid, it can be treated at the same time as dyeing. be.

EXAMPLES The method for manufacturing a diaper of the present invention will be specifically explained below using Examples. In the examples, parts are heavy PA parts, and φ is heavy i%.
It is. The water absorbency (wicking property) and water holding property of the obtained diaper were evaluated by the following method.

+1) Water absorption (wicking property) After leaving the knitted fabric in a glue atmosphere at a temperature of 20°C and a relative humidity of 60% for 48 hours, drop a drop of distilled water on the fabric surface and measure the time until it is completely absorbed. (seconds) was measured.

(2) After immersing the water-retaining cotton fabric in distilled water for 10 minutes, let the wet knitted fabric hang down without squeezing it for 5 minutes, then measure the weight (W) of the wet knitted fabric, and immerse it in water. The adhesion rate of water to the weight (WO) of the silk cloth before washing was determined using the following formula.

Example 1 50 denier 48 filament polyethylene terrestrial fiber obtained by false twisting and bulky processed yarn was knitted on 64 machines with a basis weight of 2 s o 1/ /
A silk cloth of size m' was subjected to hydrophilic treatment at the same time as dyeing under the treatment conditions of the following composition. Next, reduction and washing were carried out according to conventional methods, and finishing setting was carried out at a temperature of 160'C for 1 minute.

Composition of treatment bath (a) Molecular part 601) 850 parts of polyethylene glycol, 50 parts of dimethyl terephthalate.

4 parts emulsified dispersion of polyester/polyether block copolymer prepared by pull-copolymerizing 350 parts of ethyne/glycol (2) Emulsifying dispersant Disper VG (manufactured by Kaisei Kagaku ■) 1y/1 ← -+ Dye Sumikaron Navy Blue 8-20
GL (manufactured by Sumitomo Chemical ■) 6thiowf) paPJH, li agent acetic acid
0.2cc/A' The obtained dyed hydrophilic knitted fabric is cut into a rectangle of 30 CwL x 60cz vertically, three pieces of the knitted fabric are laminated, and the periphery of the laminate is sewn with sewing thread to make a diaper product. And so.

The water absorption and water retention properties of the obtained product were evaluated in comparison with conventional cotton diapers. Tables 1 and 2 show +5.

Table 2 As is clear from the detailed explanation above, a diaper constructed like Mizumoto iFJ has particularly excellent water absorbency and water holding ability, which are the two major characteristics required for a diaper, and is also durable in water absorption. It is flexible and has appropriate elasticity and feel.

+1. ) Patent applicant: Teijin Ltd. Procedural Amendment March 1, 1980 Mr. Commissioner of the Patent Office 1. Indication of the case: Patent Application No. 1960-196061 2. Name of the invention: Omega made from polyester fiber 3. Make amendments. Patent applicant 1-11 Minamihonmachi, Higashi-ku, Osaka (Representative of Teijin Limited, Tomoo Tokusue (and one other person) 5 Subject of amendment (1 No. Pages 6 and 15 of the specification) The line description "...Triconte knitting machine..." was changed to "...Three-stage double-sided knitting machine..."
I am corrected.

that's all

Claims (1)

[Claims] Two or more knitted fabrics having a coating containing a polyester/polyether block copolymer with a molecular weight of 500 to io, oo and made of bulky processed polyester yarn are layered,
A highly water-absorbent diaper made of a single-layer body bonded at its periphery.