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177.1632 Poly (phenyl&chyph;enetereph&chyph;thala&chyph;mide) resins.

Home > Regulations > Indirect food additives: Polymers > 177.1632 Poly (phenyl&chyph;enetereph&chyph;thala&chyph;mide) resins.



[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: 21CFR177.1632]

[Page 310-311]
 
                        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 B_Substances for Use as Basic Components of Single and Repeated 
                        Use Food Contact Surfaces
 
Sec.  177.1632  Poly (phenyl enetereph thala mide) resins.

    Poly(phenyleneterephthalamide) resins identified in paragraph (a) of 
this section may be safely used as articles or components of articles 
intended for repeated contact with food.
    (a) Identity. For the purpose of this section, the poly(phenylene- 
terephthalamide) resins (CAS Reg. No. 26125-61-1) are produced by the 
polymerization of terephthalolyl chloride

[[Page 311]]

with p-phenylenediamine. The poly(phenyleneterephthalamide) resin fibers 
and yarns may contain optional adjuvant substances required in their 
preparation and finishing.
    (b) Optional adjuvant substances. The poly(phenyleneterephthalamide) 
resins identified in paragraph (a) of this section may contain the 
following optional adjuvant substances, subject to any limitation on 
their use:
    (1) Optional adjuvant substances authorized for this use in 
accordance with Sec.  174.5 of this chapter.
    (2) Optional finish components, total weight not to exceed 1 percent 
by weight of the base polymer, as follows:

------------------------------------------------------------------------
            List of substances                       Limitations
------------------------------------------------------------------------
Diundecylphthalate (CAS Reg. No. 3648-20-
 2).
Mono- and dipotassium salts of lauryl
 phosphate (CAS Reg. No. 39322-78-6).
o-Phenylphenol (CAS Reg. No. 90-43-7).....  For use as a fungicide for
                                             finish coating materials.
                                             Not to exceed 0.01 percent
                                             by weight of the base
                                             polymer.
Poly(oxyethylene/oxypropylene)mono
 butylether (CAS Reg. No. 9038-95-3).
Poly(oxyethylene) mono(nonylphenyl)ether
 (CAS Reg. No. 9016-45-9).
Polyvinyl methylether (CAS Reg. No. 9003-
 09-2).
Poly(oxyethylene) sorbitol monolaurate
 tetraoleate (CAS Reg. No. 71243-28-2).
Poly(oxyethylene) sorbitol hexaoleate (CAS
 Reg. No. 57171-56-9).
4,4'-Butylidenebis (6-tert-butyl-m-cresol)  For use only as an oxidation
 (CAS Reg. No. 85-60-9).                     inhibitor for finish
                                             coating materials. Not to
                                             exceed 0.01 percent by
                                             weight of the base polymer.
------------------------------------------------------------------------

    (c) Specifications. (1) Poly(phenyleneterephthalamide) resins in the 
form of continuous filament yarns or fibers that have been scoured in 
accordance with paragraph (d)(1) of this section, when refluxed in a 50 
percent ethanol/water mixture for 24 hours, yields total extractables 
not exceeding 0.5 percent by weight of the sample.
    (2) Poly(phenyleneterephthalamide) resins in the form of pulp, when 
refluxed in a 50 percent ethanol/water mixture for 24 hours, yields 
total extractables not exceeding 0.65 percent by weight of the sample.
    (d) Conditions of use. (1) Poly(phenyleneterephthalamide) resins in 
the form of continuous filament yarns and fibers may be used as 
components of articles intended for repeated use in contact with food at 
temperatures not to exceed 260 [deg]C (500 [deg]F). All items are 
scoured prior to use by agitation in a water bath containing 0.5 gram/
liter of tetrasodium pyrophosphate and 0.5 percent detergent. The items 
are agitated at 80 [deg]C (180 [deg]F) for 20 minutes, and then 
subjected to a cold water rinse.
    (2) Poly(phenyleneterephthalamide) resins in the form of pulp may be 
used as gaskets and packing for food processing equipment at 
temperatures not to exceed 260 [deg]C (500 [deg]F).

[57 FR 3125, Jan. 28, 1992, as amended at 69 FR 24512, May 4, 2004]





Additives that reference this regulation:


Source: U.S. Code of Federal Regulations - CFR Title 21, Part 177, Section 1632


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