1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243TO PLACE A DOCUMENT
3、 ORDER; (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http:/www.sae.orgCopyright 1994 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001RECOMMENDEDPRACTICESubmitted for recognition as an American National Sta
4、ndardJ1700ISSUEDAPR94Issued 1994-04SOFTENING POINT OF INTERIOR TRIM ADHESIVESForewordThis Document has not changed other than to put it into the new SAE Technical Standards BoardFormat.1. ScopeThis SAE Recommended Practice shall be used to determine the temperature at which an adhesivesoftens to the
5、 point at which it no longer can support a given load.2. References2.1 Related PublicationThe following publications are provided for information purposes only and are not arequired part of this document.2.1.1 ASTM PUBLICATIONAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-29
6、59.ASTM D 816-82Methods of Testing Rubber Cement2.1.2 OTHER PUBLICATIONSAdhesives Technology Handbook, Arther H. Landrock, Noyes Publications, 19853. Definitions3.1 Softening PointThe temperature at which an adhesive will soften to the point where it will be unable tosustain a predetermined load.3.2
7、 Interior Trim AdhesivesTypically solvent or water based, or hot melts, these adhesives typically developtheir strength with the application of heat, pressure, and/or time. They are applied to interior components suchas door trim panels, arm rests, headlinings, etc.3.3 SeparationThe point at which t
8、he bonded substrates disconnect from one another at the adhesive.3.4 Open TimeThe interval of time between application of the adhesive on the adherent and completion ofassembly of parts for bonding. During this period, the adhesive-coated surfaces are exposed to air beforebeing assembled together.3.
9、5 Conditioning TimeThe time interval between removal of the joint from conditions of heat and/or pressureused to accomplish the bonding and the attainment of approximately maximum-bond strength.SAE J1700 Issued APR94-2-3.6 CreepThe dimensional change with time of a material under load. Creep at room
10、 temperature is sometimescalled cold flow.4. Equipment Required4.1 OvenCapable of holding a temperature to within 1 C (1.8 F) in the 37.8 C (100 F) to 205 C (400 F)range.4.2 Thermocouple and Recorder4.3 Timer60 min4.4 1.85 Cotton-Drill Cloth CouponsCut into 25.4 x 114.3 mm (1 x 4.5 in) pieces with a
11、 centered hole at oneendminimum 9one possible source is Industrial Coatings Group Inc., 220 Broad Street, Kingsport, TN37660.NOTE1.85 cotton-drill cloth is used for the coupon application because of its consistent surface andnegligible weight.4.5 RollerAble to apply a load of 0.357 kg/cm (2 lb/in) w
12、idth.4.6 Weights50 gminimum 6.4.7 Steel PanelsClean uncoated, cold rolled101.6 x 152.4 mm (4 x 6 in)minimum 3.4.8 Clamps, StandCapable of securing coupon/steel panel test assembly vertically while in oven environment.5. Sample PreparationSoftening Point Coupons5.1 Make a 0.2 mm (0.008 in) wet-film t
13、hickness (or manufacturers recommendations) by 12.7 x 101.7 mm (0.5 x4.0 in) adhesive strip parallel with the 152.4 mm (6 in) edge at the center of the steel panel.5.2 After 1 min open time (or manufacturers recommended open time) locate three coupons evenly spaced at theirends along the 101.6 mm (4
14、 in) steel panel edge opposite the centered hole and with the centered holes on the25.4 x 114.3 mm (1 x 4.5 in) coupons opposite the 25.4 mm (1 in) overlap bonded area. Roll the couponsagainst the steel using 0.357 kg/cm (2 lb/in) roller making three passes.NOTEThree cotton cloth coupon/steel panel-
15、test assemblies are required per condition.5.3 Condition the cotton cloth coupon/steel panel-test assemblies for a minimum of 24 h at room temperature (ormanufacturers recommendations).6. Test ProcedureSoftening Point6.1 Preheat the oven to 37.8 C (100 F).6.2 Secure the control (first) test assembly
16、 at room temperature in a vertical position in a stand with the coupon-centered holes down. Hang one 50 g weight from each of the three cotton-drill coupons in this first testassembly. Set the first test assembly aside as the control panel.6.3 Secure a second test assembly in a vertical position in
17、a stand with the coupon centered holes down and hangone 50 g weight from each of the three cotton drill coupons. Attach a thermocouple to the center backside ofthe test assembly steel panel and carefully place the entire assembly in the 37.8 C (100 F) preheated oven.Gently close the door and set the
18、 timer for 15 min.SAE J1700 Issued APR94-3-6.4 After 15 min, carefully observe both test assemblies to determine if any coupons have separated from the steelpanel. If no separation is observed, gently close the oven door, increase the open temperature 5.6 C (10 F),and set the timer for another 15 mi
19、n. Repeat this procedure until separation occurs.6.5 When separation occurs record the oven temperature. Observe the control panel; signs of creep or separationexisting on the control panel make the test invalid.6.6 Remove the test assembly components, thermocouple, coupons, and weights from the ove
20、n. Decrease theoven temperature 5.6 C (10 F). Secure the last test assembly vertically in a stand with the coupon centeredholes down. Hang one 50 g weight from each of the three coupons and attach the thermocouple to the centerbackside of the test assembly steel panel. After the oven temperature has
21、 stabilized, carefully place theassembly in the oven and gently close the door. Set the timer for 15 min.6.7 After 15 min, open the oven and carefully observe the test assembly to determine if any of the three testcoupons have separated from the steel panel. If no separation has occurred gently clos
22、e the oven andincrease the temperature 1.1 C (2 F). Set the timer for another 15 min. Repeat until separation occurs.6.8 When separation occurs record the temperature, this is the adhesives softening point 1.1 C (2 F). Observethe control panel; signs of creep or separation existing on the control pa
23、nel will make the test invalid.7. Report Requirements7.1 Report the test method and any deviations from the recommended test method.7.2 Report complete identification of samples (coupon and steel type, adhesive type, and wet film thickness),sample preparation (open time, conditioning time, temperatu
24、re, and humidity during preparation, etc.), andhumidity during testing.7.3 Report any inconsistencies or irregularities (substrate elongation, deformation, etc.) noted during the test.PREPARED BY THE SAE TRIM ADHESIVES SUBCOMMITTEEOF THE SAE MATERIALS JOINING COMMITTEESAE J1700 Issued APR94Rationale
25、Not applicable.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationThis SAE Recommended Practice shall be used to determine the temperature at which anadhesive softens to the point at which it no longer can support a given load.Reference SectionASTM D 816-82Methods of Testing Rubber CementAdhesives Technology Handbook, Arther H. Landrock, Noyes Publications, 1985 Developed by the SAE Trim Adhesives SubcommitteeSponsored by the SAE Materials Joining Executive Committee
