§177.1850 Textryls.
Textryls identified in this section may be safely used as articles or components of articles, intended for use in producing, manufacturing, packing, processing, preparing, treating, packaging, transporting or holding food, subject to the provisions of this section.
（a） Textryls are nonwoven sheets prepared from natural or synthetic fibers, bonded with fibryl （Fibryl consists of a polymeric resin in fibrous form commingled with fiber to facilitate sheet formation and subsequently heat cured to fuse the fibryl and effect bonding）.
（b） Textryls are prepared from the fibers, fibryls, and adjuvants identified in paragraph （c） of this section, and subject to limitations prescribed in that paragraph, provided that any substance that is the subject of a regulation in parts 174, 175, 176, 177, 178 and § 179.45 of this chapter conforms with any specifications in such regulation for that substance as a component of polymeric resins used as food contact surfaces.
（c） The fibers, fibryls, and adjuvants permitted are as follows:
| Substances | Limitations |
| (1) Fibers prepared from polyethylene terephthalate resins | Conforming with § 177.1630 . |
| (2) Fibryls prepared from vinyl chloride-vinyl acetate copolymer | As the basic polymer. |
| (3) Adjuvant substance, dimethylformamide | As a solvent in the preparation of fibryl. |
（d） Textryls meeting the conditions of test prescribed in paragraph （d）（1） of this section are used as prescribed in paragraph （d）（2） of this section.
（1） Conditions of test. Textryls, when extracted with distilled water at reflux temperature for 1 hour, yield total extractives not to exceed 1 percent.
（2） Uses. Textryls are used for packaging or holding food at ordinary temperatures and in the brewing of hot beverages.