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iResolve - http://iresolve.eu Thu, 06 Aug 2020 22:11:51 +0000 Joomla! - Open Source Content Management en-gb Infinicel - what is made of? http://iresolve.eu/index.php/component/k2/item/92-infinicel-what-is-made-of? http://iresolve.eu/index.php/component/k2/item/92-infinicel-what-is-made-of?

Infinicel Core

Infinicel is the commercial name used in some countries (like US) to advertise core utilized in P&G sanitary napkins. Formula and process to manufacture this core is very secret and not easy to discover. But using some patents we can make a very reliable guess.

Always Infinity core is composed of relatively thin, collapsed, polymeric foam material that, upon contact with aqueous body fluids, expand and absorb such fluids. These collapsed polymeric foam materials are also sufficiently flexible and soft so as to provide a high degree of comfort to the wearer.

These absorbent polymeric foam materials comprise a hydrophilic, flexible, nonionic polymeric foam structure of interconnected open-cells that provides a specific surface area per foam volume. The foam structure has incorporated therein a toxicologically acceptable, hygroscopic, hydrated salt. The chemistry is primarily 2-Ethylhexyl acrylate and divinyl benzene with calcium chloride in the dense layer to maintain collapsed state.

This relatively thin, collapsed polymeric foam materials is obtained by polymerizing a specific type of water-in-oil emulsion, commonly known as High Internal Phase Emulsions or "HIPE". The oil phase of these HIPE emulsions comprises of a monomer component having: (a) a monofunctional glassy monomer; (b) a monofunctional rubbery comonomer; (c) a polyfunctional crosslinking agent component. The oil phase further comprises of emulsifier component that is soluble and will provide a stable emulsion for polymerization. The water or "internal" phase of these HIPE emulsions comprises an aqueous solution containing a water-soluble electrolyte. The weight ratio of the water phase to the oil phase in these HIPE emulsions is not know but should be around 50:1.The polymerized foam is subsequently dewatered to provide the collapsed foam material. 

An important aspect of the process is to carry out the emulsion formation and polymerization steps in a manner such that coalescence of the relatively small water droplets formed in the HIPE emulsion is reduced. This leads to a number average cell size in the resulting polymeric foam material of about 50 microns or less. It is a key mechanism behind consistent formation of this material. This reduction in coalescence can be consistently achieved or by the use of certain emulsifier systems either by the use of lower temperatures during polymerization (curing). Stay tuned for next part.

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Product Design Sat, 25 Aug 2012 13:16:10 +0000
Always Infinity http://iresolve.eu/index.php/component/k2/item/77-always-infinity http://iresolve.eu/index.php/component/k2/item/77-always-infinity


infinityAlways Infinity is the name in US of a new sanitary napkin started to be distributed in major markets around the world. In Italy it is sold with name LINES E' starting from last July. Its absorbent core consists of a new and unique material called (in US) Infinicel. It is a sort of foam made of super absorbent polymer that is claimed to absorb 10 times its weight. Moreover the absorbent core has some holes in the center to facilitate absorption and some transversal channels in the back to increase fit.

It is incredibly soft and flexible and it seems it will lead a new development pathway for future products of this class. Of course it is sold as a premium product.

As far the chassis structure it is very simple with an asymmetric shape (the back is wider than the front) and double wings (as sometime it is possible to find in products coming from far east). Wings are elasticated on the sides as already seen in the past on P&G products. 

Cover consists of a very soft nonwoven perforated in a central stripe onto the absorbent core.

Packaging is aligned to a product that want to be a premium product: it is a carton box witha small transparent window to see the coulored product inside. As usual sanitary napkins are trifolded and packaged one by one in a confortable and convenient coloured pouch. On the box there is a very long list of patents.

Here it is possible to find a drawing with main dimension for regular size.

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Product Design Mon, 20 Aug 2012 20:07:44 +0000