§177.2355 用矿物质增强的尼龙树�?Mineral reinforced nylon resins)

��177.2355 Mineral reinforced nylon resins


　　 Mineral reinforced nylon resins identified in paragraph （a� of this section may be safely used as articles or components of articles intended for repeated use in contact with nonacidic food （pH above 5.0� and at use temperatures not exceeding 212 ��F. in accordance with the following prescribed conditions:

　　（a� For the purpose of this section the mineral reinforced nylon resins consist of nylon 66, as identified in and complying with the specifications of �� 177.1500, reinforced with up to 40 weight percent of calcium silicate and up to 0.5 weight percent 3-（triethoxysilyl� propylamine （Chemical Abstracts Service Registry No. 000919302� based on the weight of the calcium silicate.

　　（b� The mineral reinforced nylon resins may contain up to 0.2 percent by weight of titanium dioxide as an optional adjuvant substance.

　　（c� The mineral reinforced nylon resins with or without the optional substance described in paragraph （b� of this section, and in the form of 1/8 -inch molded test bars, when extracted with the solvents, i.e., distilled water and 50 percent （by volume� ethyl alcohol in distilled water, at reflux temperature for 24 hours using a volume-to-surface ratio of 2 milliliters of solvent per square inch of surface tested, shall meet the following extractives limitations:

　　�?� Total extractives not to exceed 5.0 milligrams per square inch of food-contact surface tested for each solvent.

　　�?� The ash after ignition of the extractives described in paragraph （c）（1� of this section, not to exceed 0.5 milligram per square inch of food-contact surface tested.

　　（d� In accordance withgood manufacturing practice, finished articles containing the mineral reinforced nylon resins shall be thoroughly cleansed prior to their first use in contact with food.

　　　　[42 FR 54533, Oct. 7, 1977, as amended at 42 FR 61594, Dec. 6, 1977]