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177.2250 Filters, microporous polymeric.

Home > Regulations > Indirect food additives: Polymers > 177.2250 Filters, microporous polymeric.



[Code of Federal Regulations]
[Title 21, Volume 3]
[Revised as of April 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR177.2250]

[Page 332-333]
 
                        TITLE 21--FOOD AND DRUGS
 
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN 
                          SERVICES (CONTINUED)
 
PART 177_INDIRECT FOOD ADDITIVES: POLYMERS--Table of Contents
 
Subpart C_Substances for Use Only as Components of Articles Intended for 
                              Repeated Use
 
Sec.  177.2250  Filters, microporous polymeric.

    Microporous polymeric filters identified in paragraph (a) of this 
section may be safely used, subject to the provisions of this section, 
to remove particles of insoluble matter in producing, manufacturing, 
processing, and preparing bulk quantities of liquid food.
    (a) Microporous polymeric filters consist of a suitably permeable, 
continuous, polymeric matrix of polyvinyl chloride, vinyl chloride-
propylene, or vinyl chloride-vinyl acetate, in which

[[Page 333]]

finely divided silicon dioxide is embedded. Cyclohexanone may be used as 
a solvent in the production of the filters.
    (b) Any substance employed in the production of microporous 
polymeric filters that is the subject of a regulation in parts 170 
through 189 of this chapter must conform with any specification in such 
regulation.
    (c) Cyclohexanone when used as a solvent in the production of the 
filters shall not exceed 0.35 percent by weight of the microporous 
polymeric filters.
    (d) The microporous polymeric filters may be colored with colorants 
used in accordance with Sec.  178.3297 of this chapter.
    (e) The temperature of food being processed through the microporous 
polymeric filters shall not exceed 180 [deg]F.
    (f) The microporous polymeric filters shall be maintained in a 
sanitary manner in accordance with good manufacturing practice so as to 
prevent potential microbial adulteration of the food.
    (g) To assure safe use of the microporous polymeric filters, the 
label or labeling shall include adequate directions for a pre-use 
treatment, consisting of washing with a minimum of 2 gallons of potable 
water at a temperature of 180 [deg]F for each square foot of filter, 
prior to the filter's first use in contact with food.

[42 FR 14572, Mar. 15, 1977, as amended at 56 FR 42933, Aug. 30, 1991]





Additives that reference this regulation:


Source: U.S. Code of Federal Regulations - CFR Title 21, Part 177, Section 2250


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