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§177.1900 用于模制制品的脲醛树?Urea-formaldehyde resins in molded articles)

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放大字体缩小字体2011-10-12 07:11:46 来源9a href="http://www.law.cornell.edu/cfr/text/21/177/1900" target="_blank" rel="nofollow">GPO浏览次数9span id="hits">2954
核心提示:本节中所指的脲醛树脂?mol的脲与不大于2mol的甲醛在水溶液中反应制成。树脂可与精制的木浆混合,混合物中可含有六亚甲基四胺、四氯邻苯二钾酸酐、硬脂酸锌。与食品接触的制成品,用按食品类型决定的溶剂,在本章175.300(d)?和表2中所规定的温度时间浸提,每一种浸提溶剂所得总浸提物量应不超?. 0775mg/cm2与食品接触表面、/div>
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备注 本节中所指的脲醛树脂?mol的脲与不大于2mol的甲醛在水溶液中反应制成。树脂可与精制的木浆混合,混合物中可含有六亚甲基四胺、四氯邻苯二钾酸酐、硬脂酸锌。与食品接触的制成品,用按食品类型决定的溶剂,在本章175.300(d)?和表2中所规定的温度时间浸提,每一种浸提溶剂所得总浸提物量应不超?. 0775mg/cm2与食品接触表面、/td>
  177.1900 Urea-formaldehyde resins in molded articles.
  
Urea-formaldehyde resins may be safely used as the food-contact surface of molded articles intended for use in contact with food, in accordance with the following prescribed conditions:
  (a For the purpose of this section, urea-formaldehyde resins are those produced when 1 mole of urea is made to react with not more than 2 moles of formaldehyde in water solution.
  (b The resins may be mixed with refined wood pulp and the mixture may contain other optional adjuvant substances which may include the following:
List of substances Limitations
Hexamethylenetetramine For use only as polymerization-control agent.
Tetrachlorophthalic acid anhydride Do.
Zinc stearate For use as lubricant.


  (c The finished food-contact article, when extracted with the solvent or solvents characterizing the type of food and under the conditions of time and temperature characterizing the conditions of its intended use as determined from tables 1 and 2 of 175.300(d of this chapter, yields total extractives in each extracting solvent not to exceed 0.5 milligram per square inch of food-contact surface as determined by the methods described in 175.300(e of this chapter.
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