Nonwovens innovations from Dow

In a series of new developments for the nonwovens industry, Dow Chemicals has manufactured a range of ultra-low formaldehyde binders for use in disposable and re-usable nonwoven applications.

The Primal Econext 110, 210 and 230 range of water-based acrylic binders are intended for formaldehyde sensitive products such as wipes, baby and adult diapers, hospital underpads, medical packaging, drapes, gowns and facemasks.

The binders are designed to offer excellent wet strength, rapid fluid penetration and a soft hand. The products are compliant with Oeko-Tex 100 standard for textile raw materials, intermediates and end products.

“We are pleased with this breakthrough. Companies can use this family of binders knowing that they were made without formaldehyde, and that it does not generate formaldehyde as it cross links with the nonwoven material it is binding,” said John Haigh, technical services and development manager for Europe, the Middle East and Africa.

This week at INDEX11, Dow is showcasing its new Aspun fibre grade polyethylene-based resins for hygiene nonwoven articles. Intended for both mono-component and bi-component fibre applications, the Aspun resin is said to offer excellent softness, drape and spinning ability, allowing manufacturers to run their lines significantly longer between dye changes.

The Aspun resins adhere well to polyethylene and polypropylene films, and when combined with homopolymer polypropylene (hPP), offer high tensile elongation for use on elastic diaper component laminates, said Dow.

Additionally, the resins can be combined with polyethylene terephthalate (PET) or polypropylene (PP) in a bi-component binder fibre for absorbent core strength. In this form, the Aspun resin offers improved liquid management, as well as the ability to downgauge cellulose nonwovens.

Also at INDEX, the company is presenting its Dow Soft Touch polypropylene (PP) resin, a single-pellet resin for the production of mono-component spunbond nonwoven fabrics.

The first product in the line, DC 543 Developmental PP resin has been designed for use in absorbent hygiene products and medical nonwovens. According to Dow, the new resin offers tactile softness, improved drape (ductile softness) and a reduction in noise intensity.

 

The Dow Soft Touch PP resin has a low bonding temperature and a broad bonding window for processing efficiency and flexibility.

It has been engineered to offer tensile properties comparable to polypropylene, as well as abrasion resistance for low linting and fuzzing in the final nonwoven article. Nonwoven webs formed with this resin can be recycled back into mainstream production.

Source: Inteletex

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