KR830002836B1 - Secretion absorber - Google Patents

Abstract

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Description

Secretion absorber

The present invention relates to an integrated monolith formed by embossing, in particular embossed under conditions of elevated temperature and pressure.

Recent products designed to absorb menstrual secretions and small amounts of menstrual fluid have been introduced. An example of such a product is KOTEX LIGHTDAYS Pantiliners. (KOTEX LIGHTDAYS is a trademark of Kimberly-Clark Company of Neenah, 54956, Wisconsin)

The pad contains an absorbent component and a liquid impermeable layer made of commonly used cellulose, such as wood pulp. This backing layer has an adhesive strip on its lower surface for attachment to female underwear. The absorbent portion has a moisture permeable covering material in contact with the apical part. The water permeable layer is attached to the downy portion by means of an adhesive layer attached to the downy. The pads are then embossed to perfect the down and create a passageway for the secretion. At this time, the backing layer is firmly attached.

These pads were very popular because they were relatively thin and bulky in size, but the use of adhesives tends to adversely affect elasticity and flexibility, and wearing such pads compromises stability. In addition, manufacturing is substantially simpler if no moisture permeable covering layer is used.

In general, relatively inexpensive, and fluffy materials traditionally used in such pads, pads, diapers, etc., tend to lose their integrity when wet, and have maximum volume in the unembossed portion because they tend to maximize absorption. It is usually designed. This unembossed portion has a good effect on the absorbency but adversely affects the absorbent batt. In other words, the individual fibers are easily separated from the bat material. This phenomenon, commonly referred to as dropout, is always undesirable and is particularly disadvantageous when the dropped fiber itself is placed on the apex and when this type of absorbent material is used as a wound bandage.

Ideally, if any kind of complex absorption model can be devised that eliminates dropouts and maintains integrity in a startup that has the advantages of conventional absorbent materials and the inexpensiveness and ease of making such materials over the years, the absorbent system part can Will show significant progress. This application provides such absorbent media.

According to the invention, the secretory absorbent material is designed to be of good integrity, good wetting, elasticity and relatively inexpensive. Such materials are particularly used as panty liners but are widely used in articles requiring absorption. The term "secretory absorbent substance" refers to an absorbent substance that absorbs various physiological liquids. As such, the term refers to any substance that absorbs both urinary and menstrual secretions as well as liquid from external wounds.

The secretory absorbent material of the present invention is made with a conventional fiber maker, and is the same as the first kind of fiber containing the absorbent material based on the conventional cellulose and the second kind of fiber which can be melted by a mild process in nature. It is made by mixing different fibers with each other. Rayon, wood pulp or such intermixed fiber batts are embossed by heat and pressure. Compressing the absorbent downy in some areas creates an embossment, which imparts integrity to the bat and melts the meltable fiber, giving virtually greater integrity than before. Moreover, the embossing completely eliminates the possibility of the fibers falling off by the interaction of heat and pressure.

Other patents describe mixing different types of fibers for different purposes, for example, U.S. Patent No. 3,976,074, which describes hydrophilic-hydrophobic blends (hydrophobic fibers retain the fiber's differentness). Patent No. 1,071,191 and US Patent No. 4,054,141, none of which mention the subject matter of the present invention.

Of course it is clear that the amount of dropping as well as the degree of completeness is a function of the ratio of non-soluble fiber and length to soluble fiber. Longer fiber lengths result in less dropout. Larger amounts of about 20-35% by weight of soluble fiber are generally ideal, although amounts greater or lower than the preferred range are possible. It should be noted that although suitably carried out with at least 50% by weight of soluble fibers in the mixture, the absorbency decreases as the proportion of soluble fibers in the secretory absorbent material of the present invention increases.

Depending on the absorbent fibrous component, the soluble fibrous component, other elements well known in the absorbent art, and the length of the fibers, the secretory absorbent material can be designed virtually as before by choosing to use the same material.

Fibers conventionally used in the present invention have been described as fibers that can be melted in a mild process. For the purposes of the present invention these fibers are limited to being capable of melting at about 225 ° F. and 375 ° F. with a linear embossing pressure of at least 300 pli. The minimum pressure to be embossed on the ship depends on the special soluble fiber selected as the low melting point fiber requiring a lower pressure. In the practice of the present invention, pressures as low as 50 pli can be used and even lower pressures may be used to achieve the necessary bonds to form the secretory absorbent pads.

In the secretory absorbent pad of the present invention, it is evident that the pad actually contributes to both absorption and dropout. In general, although an optional embossed form with space over the entire surface of the pad is good, a partially denser embossed form may be desirable for certain particular examples. Also for the purpose of completeness, if the form consists of a series of straight or corrugated lines, the individual components of the embossed form or the components of the embossed line are preferably closer in distance to each fiber length. Embossed like this

The incorporation of absorbent non-absorbent fibers without adhesion is extensively described in US Pat. No. 4,100,324. The patent describes the formation of an integrated adhesive fiber structure of thermoplastic microfibers and wood pulp fibers, wherein primary air containing molten and blown thermoplastic microfibers and secondary air containing wood pulp fibers are described. By mixing together, the fibers are integrated. For the purposes of this patent air is joined in turbulent flow. Melt blowing actually requires high temperatures and melt

The secretory absorbents of the present invention are widely used while being particularly useful for panty liners. The panty liner according to the invention can be made without the use of a top cover material through which the separable fluid can permeate, so the panty liner itself consists only of a liquid impermeable membrane and is required between the wrap and the panty liner absorber. There is no need for adhesive bonding. It also eliminates absorbent interference and strength with the adhesive and simplifies manufacturing operations. Moreover, because the liquid impermeable baffle can be thermoplastic, the secretion absorbing material

Examples of the secretory absorbent material of the present invention are as follows. In all instances the fusion of the various fibers was weighed in an amount depending on each component and mixed in a RANDO-Opener Blender device to form a uniform fiber batt. Bats are made in RANDO-WEB Processor, a conventional apparatus used for bat production in the textile manufacturing industry. The fused complete rule from the RANDO-WEB Processor is fed to a heated embossed roll in which the fibers are melted into a fibrous bat forming the substrate of the present invention. (All process equipment described in the above and examples are made by RANDO Machine Company of Macedon, NY)

Example 1

The first embodiment provides a pass made of a mixture of 70% rayon raw material and 30% viscous raw material. The twist component is a thermoplastic vinyl resin fiber made by Avtex Fibers Company and made from a copolymer of vinyl chloride and vinyl acetate. After processing in RANDO-WEBBER, the base web has a density of 0.040 g / cc. The formed webs are heated and embossed at embossing pressures of 280 ° F and 90pli. Embossing here and for all of the following examples takes place in conventional embossed rolls used in connection with steel anvil rolls. Embossed

Example 2

The pads made from Example 1 are compared to the materials recently used for KOTEX LIGHTDAYS pads at Handle-O-Meter. The measured sample is 2 "x 3" and the difference is 1 "in Handle-O-Meter. The experiment of the five samples produced was 95.7 for the material found in the LIGHTDAYS pad and 29.9 g for the material formed according to Example 1 Handle-O-Meter is a well-known and made by Thwing Albert Instrument company in Philadelphia, Pennsylvania that measures the degree of elasticity perceived as a sense of stability.

Example 3

Several other fusions are made as in Example 1. The properties of the fusions are shown in the table below.

Table 1

Fiber fusion%

Rayon 70 / polypropylene 30 rayon 25 / cotton fiber 50 / flopropylene 25

Rayon 60 / Polypropylene 40 Rayon 75 / Chisso ES 25

Rayon 50 / Polypropylene 50 Rayon 60 / Beep 40

Rayon 30 / wood pulp 30 / polypropylene 40

In all cases in the table, the rayon fiber length was 1-9 / 16 ", while the polypropylene was 1-1 / 2" and Chisso and 2 "were Chisso ES. CHISSO ES is a trademark of the Chisso company in Wyckoff, NJ, and one side is polypropylene. The other is its component fiber, which is polyethylene, which is melted at 280 ° -300 ° F, which is the processing temperature used during the heat-embossing step in manufacturing, polypropylene melts at 320 ° -340 ° F and the processing temperature is Maintained in range.

As can be seen from this table, composite thermoplastic fibers as well as mixtures of absorbent fibers are implemented within the scope of the present invention. As long as the soluble fibers melt within approximately the same temperature range, changes in the mixture of absorbent fibers and soluble fibers are virtually possible under the conditions of the present invention and are desirable for any particular application in which the properties of the various thermoplastics are utilized.

These absorbent pads are embossed with sine crests. Repeated sinusoidal crests are shaped over the length of the pad increment.

Although no Handle-O-Meter tests were performed on each of these compounds, subjective tests showed that they were much closer to the products of Example 1 in elasticity and softness than KOTEX LIGHTDAYS pads, which consist of 100% wood pulp fibers as an absorbent component. I found out. In the preliminary absorption experiments, the absorption is slightly less compared to the KOTEX LIGHTDAYS pad and the phenomenon is related to the amount of thermoplastics present, while the absorption reduction is minimal and a small amount of high performance absorption in powder form or as added fiber during the manufacturing stage. By introducing a substance

Claims (1)

Endocrine complexes with sufficient amounts of fiber that can be melted in a dense mixture of insoluble absorbent fibers and in a mild process to form an integrated monolith that embosses an optional portion to impart the integrity of the primary monolith obtained. Absorber.