[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: |
