Biobased binders

Biobased binders

Biobased binders for nonwoven & technical textiles

Binders are used to improve the mechanical properties of nonwoven and technical textiles. Properties that can be improved are dry strenght, wet strength and dimensional stability with varying degree of stiffness or softness. Conventional binders are predominantly made of non-degradable petroleum-based polymers (e.g. plastics such as EVA, acrylics), even though the fibers may be entirely from renewable cellulose. OrganoClick has developed and are supplying a range of biobased binders for nonwoven and technical textiles under the trade name OC-BioBinder™. Using our biobinders, completely biodegradable and 100 % compostable nonwovens can be produced.

Nonwoven binders

Nonwoven textiles are used in a large number of applications such as e.g. filter materials, automotive textiles, medical textiles, hygiene products, napkins, table cloths, wet wipes, agricultural textiles, geotextiles and insulating materials. The nonwovens can be made of natural fibers such as viscose and wood fibers or by synthetic fibers such as polyester, polyamide etc. The bonding between the fibers may be either by mechanical bonding (i.e. fiber entangling), thermobonding or by chemical bonding using chemical binders. The chemical binders has traditionally been petroleum-based plastic binders such as ethylene vinyl acetate (EVA), poly vinylalcohol (PVA), acrylics, etc. These are not biodegradable and even though the fibers in the nonwoven may be biodegradable (i.e. viscose and wood fibers), the final nonwoven fabric will not be biodegradable as it normally consists of 10-30 % binder.

Technology

Binder technology
OC-BioBinder™ is a biobased binder system based on modified biopolymers and natural plant compounds. By using OrganoClick's technology for modification of fibers, the biopolymers are attached to the fibers and to eachother, creating a network around and in between the fibers in the material. The products are classified as non-irritating and non-dangerous to the environment by the European REACH regulations, and therefore enables the manufacturing of more sustainable fiber-based materials. The binders are classified as readily biodegradable in accordance with OECD 301C and can be used to produce 100 % biodegradable and compostable nonwovens. The OC-biobinder™ system can also be used on woven textiles to increase stiffness and prevent fraying making it suitable for the manufacturing of sun blinds. On nonwoven or air-laid materials, OC-BioBinder™ can increase tensile wet and dry strength, decrease linting and improve dimensional stability. The system is compatible with most types of fibers, including cellulose-based fibers (e.g. cotton, paper pulp), synthetic fibers (e.g. polyester, PLA), mineral fibers (e.g. glass fibers) and mixed fibers. Current applications for our biobnders include materials for napkins, agriculture, interlinings, hygiene products and table cloths.

Product range

The OC-BioBinder™ system consists of numerous products, affecting the mechanical properties of the fiber-based material in different ways with varying softness, dry and wet strength, hydrophilicty or hydrophobicity, etc. The products have different viscosity, solid content, etc. and therefore can be applied to the nonwoven or textile material in different ways. Generally, the material is impregnated with an aqueous solution of OC-biobinder™ by dipping, padding, coating or spraying. Subsequent to the application, the fiber-based material is dried at elevated temperatures. Below is a chart decsribing the various products and their properties.

OC-BioBinder™ Product range