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  <xsd:element abstract="true" id="ntic_DocumentAndEntityInformation" name="DocumentAndEntityInformation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_ESPPMember" name="ESPPMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_EXCORMember" name="EXCORMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_EffectiveIncomeTaxRateReconciliationDividendsReceivedAmount" name="EffectiveIncomeTaxRateReconciliationDividendsReceivedAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="ntic_EntityWideTradeJointVentureReceivablesFourJointVenturespercentage" name="EntityWideTradeJointVentureReceivablesFourJointVenturespercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="ntic_FederalAndStateTaxMember" name="FederalAndStateTaxMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_FeesForServicesProvidedToJointVentures" name="FeesForServicesProvidedToJointVentures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_FeesForServicesProvidedToJointVenturesMember" name="FeesForServicesProvidedToJointVenturesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_FeesReceivableForServicesProvidedToJointVenturesCurrent" name="FeesReceivableForServicesProvidedToJointVenturesCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="ntic_Fiscal2017BonusPlanMember" name="Fiscal2017BonusPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_Fiscal2018BonusPlanMember" name="Fiscal2018BonusPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_IncreaseDecreaseInFeesReceivableForServicesProvidedToJointVentures" name="IncreaseDecreaseInFeesReceivableForServicesProvidedToJointVentures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="ntic_IncreaseDecreaseInTradeReceivablesExcludingJointVentures" name="IncreaseDecreaseInTradeReceivablesExcludingJointVentures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="ntic_IncreaseDecreaseInTradeReceivablesJointVentures" name="IncreaseDecreaseInTradeReceivablesJointVentures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_IndirectCostOfGoodsSoldMember" name="IndirectCostOfGoodsSoldMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_InsideTheUSAToUnaffiliatedCustomersMember" name="InsideTheUSAToUnaffiliatedCustomersMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_JPMorganChaseBankMember" name="JPMorganChaseBankMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_JointVentureInIndiaMember" name="JointVentureInIndiaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_JointVentureOperations" name="JointVentureOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_JointVenturesInWhichTheCompanyIsAShareholderDirectlyAndIndirectlyOutsideTheUSAMember" name="JointVenturesInWhichTheCompanyIsAShareholderDirectlyAndIndirectlyOutsideTheUSAMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_NTIAseanLLCMember" name="NTIAseanLLCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_NaturTecMember" name="NaturTecMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_NetSalesExcludingJointVentures" name="NetSalesExcludingJointVentures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="ntic_NetSalesToJointVentures" name="NetSalesToJointVentures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_NoteToFinancialStatementDetailsTextual" name="NoteToFinancialStatementDetailsTextual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_NumberOfJointVentureArrangements" name="NumberOfJointVentureArrangements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant"/>
  <xsd:element id="ntic_NumberOfStockBasedCompensationPlans" name="NumberOfStockBasedCompensationPlans" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_OfficeAndWarehouseSpaceMember" name="OfficeAndWarehouseSpaceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_OneYearAfterDateOfGrantMember" name="OneYearAfterDateOfGrantMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_OperatingLeasesMonthlyRentExpense" name="OperatingLeasesMonthlyRentExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_OtherCountriesMember" name="OtherCountriesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_PNCBankMember" name="PNCBankMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_PatentsAndTrademarksMember" name="PatentsAndTrademarksMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_PercentageOfIndividualBonusPayoutDeterminedByActualVersusTargetedEBITOIResults" name="PercentageOfIndividualBonusPayoutDeterminedByActualVersusTargetedEBITOIResults" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_PercentageOfIndividualsPayoutDeterminedUponAchievementOfCertainPreEstablishedIndividualPerformanceObjectives" name="PercentageOfIndividualsPayoutDeterminedUponAchievementOfCertainPreEstablishedIndividualPerformanceObjectives" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_PropertyAndEquipmentUsefulLifeTableTextBlock" name="PropertyAndEquipmentUsefulLifeTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_ReceivablesFromJointVenturesPolicyPolicyTextBlock" name="ReceivablesFromJointVenturesPolicyPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_ReconciliationOfCostOfGoodsSoldFromSegmentsToConsolidatedTableTextBlock" name="ReconciliationOfCostOfGoodsSoldFromSegmentsToConsolidatedTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_RoyaltyPaymentExpenseMember" name="RoyaltyPaymentExpenseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_TermLoanAndLineOfCreditAgreementsLoanAgreementsMember" name="TermLoanAndLineOfCreditAgreementsLoanAgreementsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_The2007PlanMember" name="The2007PlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_TianjinZerustMember" name="TianjinZerustMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_TotalFeesForServicesProvidedToJointVenturesGeographicLocation" name="TotalFeesForServicesProvidedToJointVenturesGeographicLocation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="ntic_TradeReceivablesExcludingJointVenturesNetCurrent" name="TradeReceivablesExcludingJointVenturesNetCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="ntic_TradeReceivablesJointVenturesCurrent" name="TradeReceivablesJointVenturesCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="ntic_UnaffiliatedCustomersOutsideTheUSAMember" name="UnaffiliatedCustomersOutsideTheUSAMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_UnitedStatesChinaIndiaGermanyAndBrazilMember" name="UnitedStatesChinaIndiaGermanyAndBrazilMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="ntic_UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions" name="UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_WeightedAverageNumberOfSharesOutstandingBasicAndDilutedAbstract" name="WeightedAverageNumberOfSharesOutstandingBasicAndDilutedAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_ZERUSTMember" name="ZERUSTMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_ZerustBrazilMember" name="ZerustBrazilMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-1-nature-of-business-and-significant-accounting-policies-property-and-equipment-useful-life-details" name="statement-statement-note-1-nature-of-business-and-significant-accounting-policies-property-and-equipment-useful-life-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-1-nature-of-business-and-significant-accounting-policies-tables" name="statement-statement-note-1-nature-of-business-and-significant-accounting-policies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-10-net-income-loss-per-common-share-reconciliation-of-the-earnings-per-share-computations-details" name="statement-statement-note-10-net-income-loss-per-common-share-reconciliation-of-the-earnings-per-share-computations-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-10-net-income-loss-per-common-share-tables" name="statement-statement-note-10-net-income-loss-per-common-share-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-11-stockbased-compensation-blackscholes-optionpricing-model-assumptions-details" name="statement-statement-note-11-stockbased-compensation-blackscholes-optionpricing-model-assumptions-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-11-stockbased-compensation-stock-option-activity-details" name="statement-statement-note-11-stockbased-compensation-stock-option-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-11-stockbased-compensation-tables" name="statement-statement-note-11-stockbased-compensation-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-cost-of-goods-sold-by-segment-details" name="statement-statement-note-12-segment-and-geographic-information-cost-of-goods-sold-by-segment-details" 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-fees-for-services-provided-to-joint-ventures-by-geographic-location-as-a-percentage-of-total-fees-details" name="statement-statement-note-12-segment-and-geographic-information-fees-for-services-provided-to-joint-ventures-by-geographic-location-as-a-percentage-of-total-fees-details" 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-net-sales-by-geographic-location-details" name="statement-statement-note-12-segment-and-geographic-information-net-sales-by-geographic-location-details" 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-net-sales-by-segment-details" name="statement-statement-note-12-segment-and-geographic-information-net-sales-by-segment-details" 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-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-15-income-taxes-provision-for-income-taxes-details" name="statement-statement-note-15-income-taxes-provision-for-income-taxes-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-15-income-taxes-reconciliation-of-the-total-amounts-of-unrecognized-tax-benefits-details" name="statement-statement-note-15-income-taxes-reconciliation-of-the-total-amounts-of-unrecognized-tax-benefits-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-15-income-taxes-reconciliations-of-the-expected-federal-income-tax-at-the-statutory-rate-with-the-provisions-for-income-taxes-details" name="statement-statement-note-15-income-taxes-reconciliations-of-the-expected-federal-income-tax-at-the-statutory-rate-with-the-provisions-for-income-taxes-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-15-income-taxes-tables" name="statement-statement-note-15-income-taxes-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-15-income-taxes-tax-effect-of-the-temporary-differences-and-tax-carry-forwards-comprising-net-deferred-taxes-details" name="statement-statement-note-15-income-taxes-tax-effect-of-the-temporary-differences-and-tax-carry-forwards-comprising-net-deferred-taxes-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-16-commitments-and-contingencies-future-minimum-rents-due-details" name="statement-statement-note-16-commitments-and-contingencies-future-minimum-rents-due-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-16-commitments-and-contingencies-tables" name="statement-statement-note-16-commitments-and-contingencies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-17-statements-of-cash-flows-supplemental-disclosures-of-cash-flow-information-details" name="statement-statement-note-17-statements-of-cash-flows-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-17-statements-of-cash-flows-tables" name="statement-statement-note-17-statements-of-cash-flows-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="ntic_statement-statement-note-18-fair-value-measurements-assets-and-liabilities-measured-at-fair-value-recurring-basis-details" name="statement-statement-note-18-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-18-fair-value-measurements-tables" name="statement-statement-note-18-fair-value-measurements-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:element abstract="true" id="ntic_statement-statement-significant-accounting-policies-policies" name="statement-statement-significant-accounting-policies-policies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>