Abstract: The present invention relates to a method for manufacturing carpet tiles having excellent dimensional stability which comprises the steps of:(a) allowing a reticulated fabric base having a small thermal coefficient of linear expansion to be contact with the whole surface of the back of a carpet base material,(b) applying a backing material prepared from a composition containing a thermoplastic material as the major component to the resulting composite material, and(c) optionally laminating a fabric backing onto the above backing material.

Abstract: Process for manufacturing a deodorizing gas filter which comprises dissolving polyvinyl alcohol in water; adding to said solution at least one substance which is an amphoteric ion exchange resin, activated carbon or coconut shell charcoal, thereby forming a pasty mass; adding to said pasty mass glyoxal, in an amount in excess of that which would be sufficient to acetalize the polyvinyl alcohol, and a small amount of acid for the acetal formation; impregnating the resulting composition into a non-woven textile fabric gas filter; and heating said impregnated filter at about 70.degree.-100.degree. C for 30 minutes to 2 hours, thereby converting said polyvinyl alcohol to polyvinyl acetal.