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  <xsd:element abstract="true" id="ntic_statement-statement-note-12-segment-and-geographic-information-tables" name="statement-statement-note-12-segment-and-geographic-information-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-12-segment-and-geographic-information-total-longlived-assets-by-geographic-distribution-details" name="statement-statement-note-12-segment-and-geographic-information-total-longlived-assets-by-geographic-distribution-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-12-segment-and-geographical-information-total-net-sales-by-geographic-distribution-details" name="statement-statement-note-12-segment-and-geographical-information-total-net-sales-by-geographic-distribution-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-14-fair-value-measurements-assets-and-liabilities-measured-at-fair-value-recurring-basis-details" name="statement-statement-note-14-fair-value-measurements-assets-and-liabilities-measured-at-fair-value-recurring-basis-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-14-fair-value-measurements-tables" name="statement-statement-note-14-fair-value-measurements-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-15-supplemental-cash-flow-information-supplemental-disclosures-of-cash-flow-information-details" name="statement-statement-note-15-supplemental-cash-flow-information-supplemental-disclosures-of-cash-flow-information-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-15-supplemental-cash-flow-information-tables" name="statement-statement-note-15-supplemental-cash-flow-information-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-3-inventories-inventories-details" name="statement-statement-note-3-inventories-inventories-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-3-inventories-tables" name="statement-statement-note-3-inventories-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-4-property-and-equipment-net-components-of-property-and-equipment-net-details" name="statement-statement-note-4-property-and-equipment-net-components-of-property-and-equipment-net-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-4-property-and-equipment-net-tables" name="statement-statement-note-4-property-and-equipment-net-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-5-patents-and-trademarks-net-patents-and-trademarks-net-details" name="statement-statement-note-5-patents-and-trademarks-net-patents-and-trademarks-net-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-5-patents-and-trademarks-net-tables" name="statement-statement-note-5-patents-and-trademarks-net-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-6-investments-in-joint-ventures-condensed-balance-sheet-of-excor-and-all-other-joint-ventures-details" name="statement-statement-note-6-investments-in-joint-ventures-condensed-balance-sheet-of-excor-and-all-other-joint-ventures-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-6-investments-in-joint-ventures-condensed-income-statement-of-excor-and-all-other-joint-ventures-details" name="statement-statement-note-6-investments-in-joint-ventures-condensed-income-statement-of-excor-and-all-other-joint-ventures-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-6-investments-in-joint-ventures-tables" name="statement-statement-note-6-investments-in-joint-ventures-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>