Fiber treating agent for staple fibers, and use for said agent

Abstract

The present invention provides a fiber treating agent for staple fibers which excels in the ability to prevent discoloration of fibers and in which there is little occurrence of scum during milling. The present invention provides a fiber and a non-woven fabric to which the treating agent is bonded. A fiber treating agent for staple fibers, the fiber treating agent essentially containing a component (A), a component (B), and a component (C), wherein the proportion by weight of the component (A) in the nonvolatile component of the treating agent is 10-60%, the proportion by weight of the component (B) is 20-60%, and the proportion by weight of the component (C) is 5-40%. Component (A): an alkyl phosphate salt having a C14-22 hydrocarbon group and / or an alkyl phosphate salt containing a polyoxyalkylene group that has a C14-22 hydrocarbon group; component (B): an ester compound of alcohol having a C6-22 hydrocarbon group and a fatty acid having a C6-22 hydrocarbon group; component (C): a silicone compound.

Description

technical field [0001] The present invention relates to a fiber treatment agent for short fibers and its utilization. Background technique [0002] Generally, absorbent articles such as sanitary products such as disposable diapers and synthetic sanitary napkins have a three-layer structure in which a pair of fibers (polyolefin fibers, polyester fibers, etc.) polyester fiber, etc.) as the main material of various non-woven fabrics made of hydrophilic top sheet; water-repellent back sheet (Backsheet); and cotton-like pulp, polymer absorbent, etc. contained between the top sheet and the bottom sheet Material. In order to prevent the leakage of urine or blood, the bottom layer needs to have strong water repellency. In addition, in the process of manufacturing the bottom non-woven fabric, if static electricity is generated, the texture of the non-woven fabric will deteriorate, so antistatic properties (antistatic properties) are required, but the fibers after water-repellent tr...

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Problems solved by technology

[0003] Therefore, it has been proposed to use alkyl phosphate ester salts with 14 to 18 carbon atoms in the alkyl group and 50 to 90% by weight of the potassium salt and 10 to 50% by weight of the sodium salt on the surface of the fiber to take into account the repellency. Water-based and antistatic properties are proposed (Patent Document 1), but the antistatic properties are not sufficient due to the increase in speed of non-woven fabric processing processes such as carding machines

In addition, the resistance to discoloration cannot be said to be sufficient

[0004] On the other hand, although it has been proposed to attach an alkyl phosphate ester salt having 12 to 18 carbon atoms, a component containing a fluorine compound, and a poly(oxyethylene) alkyl ether component to fibers (Patent Document 2) , but compounds containing perfluoroalkyl groups have high water repellency, but the accumulation of by-products such as PFOA in the human body becomes a problem

Therefore, there have been proposed compounds containing perfluoroalkyl groups in which the number of carbon atoms has been changed, but they tend to have poor solution stability

Usually, the treatment agent is dissolved in water and oil is supplied, but if the stability of the solution is poor, there is a problem that scum is generated on the rollers that supply the treatment agent, etc.

In addition, compounds containing perfluoroalkyl groups are generally expensive, and for general-purpose products, they do not meet the cost requirements, so they are difficult to use

[0005] As mentioned above, no fiber treatment agent that satisfies discoloration resistance and low scumming properties has been developed so far

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