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1、M0159 2005-1 - 1/9 - Nissan Engineering Standard N E S Testing Method of the Scratch Resistance of Interior Polypropylene Resin Parts 1. SCOPE AND CLASSIFICATION This Standard specifies the methods for testing the scratch resistance hereinafter referred to as test methods of automotive interior resi
2、n parts hereinafter referred to as parts. These test methods are applied specifically to the parts made of polypropylene hereinafter referred to as PP and its compound materials hereinafter referred to as PPC of interior resin parts. These test modes shall not be applied to a painted portion or a su
3、rface coated plastic part. 2. TYPES OF TEST METHODS The test methods and jig types shall be as shown below. 2.1 Test method and jig Method A: Method using a crosscut adhesion testing machine Tungsten steel needleTest method to evaluate the degree of whitening Method B: Method using a crosscut adhesi
4、on testing machine Claw fixtureTest method to evaluate the degree of increased gloss Method C: Method using a seat belt tongue scratch testing machine seat belt tongueTest method to evaluate the effect of seat belt tongue impact scratching. 3. APPLIED PARTS The test method shall be classified into 3
5、 classes as shown in Table 1 along with the examples of the applied parts. Table 1 Applicable part for test method Evaluation method Material Type Used Method AMethod B Method C Judgement criteria Interior polypropyrene resin parts O Table 8 High-impact polypropyrene resin parts PANEL amp PAD ASSY I
6、NST PANEL ASSY-INST LWR GARN-FR PLR GARN-CTR PLR UPR GARN-CTR PLR LWR FIN-RR PLR CTR CONSOLE FIN-CONSOLE BOX O O Table 9 FIN ASSY DOOR GARN ASSY-CTR PLR LWR GARN ASSY-CTR PLR UPR O O O Table 10 Note High-impact polypropylene resin parts refer to PP-RC-006 PP-HIT-001 and other materials identified in
7、 NES M8012 integrated material No. 2 and high-impact straight PP material. High-impact straight PP material shall be excluded from the scope of Method B. Method C can be ignored in cases in which there is no risk of causing scratch on the seat belt tongue because of the vehicle layout. Normative Ref
8、erences: NES M 8022 PVC Slush-Molded Skin NES M 8012 Filler Reinforced Polypropylene JIS G 4404 Alloy tool steels JIS K 5600-5-5 Testing methods for paints - Part 5: Mechanical property of film- Section 5: Scratch hardness Stylus method JIS K 7100 Plastics - Standard atmospheres for conditioning and
9、 testing JIS L 0804 Grey scale for assessing change in colour JIS L 0849 Test methods for colour fastness to rubbing M0159 2005-1 - 2 - 4. CONDITIONS OF TEST SITE Test condition shall satisfy the conditions in JIS K 7100 Plastics - Standard atmospheres for conditioning and testing. Temperature betwe
10、en 18 and 28C relative humidity between 40 and 70 5. EQUIPMENT 5.1 Method A 1 Crosscut adhesion testing machine: Specified in 4.1 of JIS K 5600-5-5 see Figure 1 or equivalent. 2 Needle: Tungsten steel needle of SKS 2 type specified in JIS G 4404 see Figure 2 or equivalent. Reference tungsten steel n
11、eedle: Needle for the crosscut paint film testing machine produced by Ueshima-seisakusho Co. Ltd. 3 Weight 5.2 Method B 1 Crosscut abrasion testing machine: Specified in 4.1 of JIS K 5600-5-5 see Figure 1 or equivalent. 2 Scratching jig machined: Stainless steel claw fixture for damage test specifie
12、d in NES M 8022 Refer to Figure 3. 3 Weight 5.3 Method C 1 Seat belt tongue scratch testing machine refer to Figure 4 or equivalent. 2 Jig: Seat belt tongue 6. TEST CONDITIONS There shall be three types of test conditions as listed in Tables 2 3 and 4. Table 2 Method A Item Condition Load 175g Scrat
13、ch Rate 500 to 600 mm/min. Stroke 50 mm Pitch feed Rotation of 135 degrees 0.75 mm Number of scratching cycles 17 scratches 12 mm in width min. Table 3 Method B Item Condition Load 500g Rate 500 to 600 mm/min. Stroke 50 mm Pitch feed Rotation of 180 degrees 1.0 mm Number of scratching cycles 17 scra
14、tches 17 mm in width min. Table 4 Method C Item Condition Tongue energy of movement at impact 0.534 J Sample application angle 45 to the direction of tongue impact Pitches 10 mm Impact times Five times or more Remark: The limit of using the scratching needle shall be 5000 cycles of reciprocating mot
15、ions for methods A and B. The stroke shall be 100 mm in principle Test pieces cut from a part shall provide a flat area which is at least 100mm square if this is not possible test should be conducted in test conditions to allow the rubbing rate of scratching jig to be 100 mm/min. M0159 2005-1 - 3 -
16、7. TEST MATERIAL The test material shall be taken out from the finished parts produced by normal production process that are held more than 24 hours after manufacturing. During this procedure the test specimen shall be made as flat as possible and larger than the specified size of test specimens for
17、 each test method. Note if the test specimen cannot be sampled from the finished part test can by conducted by a test piece or plaque. Size of test specimen: Method A and B: 50 mm 50 mm min. Method C: 100 mm 100 mm min. Remark: The finished part shall be representative of the actual vehicle conditio
18、n. 8. PROCEDURE 8.1 Method A 1 Confirm in advance that the test condition conforms to Table 2. 2 Attach adhesive double-sided tape to the specimen base of crosscut adhesion testing machine. 3 Set a needle into the crosscut adhesion testing machine. 4 Adjust balance of arm for the crosscut adhesion t
19、esting machine by using balance weight. 5 Adjust the height of needle so that it will be horizontal. 6 Peel off the released paper of adhesive double-sided tape and set the test specimen on the specimen base. 7 Turn the switch ON move the specimen base to the right side and turn the switch OFF. 8 Tu
20、rn the needle feed handle to the left side and move the needle into the recess. 9 Hold the arm of crosscut adhesion testing machine and load the specified weight such that the needle does not touch the test specimen. 10 Gently allow the needle to contact the test specimen slowly. 11 Turn the switch
21、ON and scratch from left to right. 12 When the scratch reaches the end raise the arm to release the needle from the test specimen. 13 Rotate the needle feed handle clockwise 135 degrees 1 and 1/2 pitches. 14 When the specimen base reaches the right side slowly lower the needle to contact the test sp
22、ecimen. 15 Repeat procedures 11 through 14 and scratch more than 17 times. 16 After test needle tip shall be protected to prevent damage. Remove the needle and protect the needle tip by covering with a suitable cover etc. If the needle has been mounted on the testing machine lift up and fix the arm.
23、 8.2 Method B 1 Confirm in advance that the test condition conforms to Table 3. 2 Set double-sided adhesive tape on specimen base of crosscut adhesion testing machine. 3 Set claw fixture on crosscut adhesion testing machine. 4 Adjust arm balance of crosscut adhesion testing machine with balance weig
24、hts. 5 Adjust claw fixture height level to be horizontal. 6 Peel off the released paper of double-sided adhesive tape and set sample on specimen base. 7 Turn switch ON move specimen base to the right and then turn switch OFF. 8 Turn needle feed handle to the left and move claw fixture into the reces
25、s. 9 Load specified weight while holding arm of crosscut adhesion testing machine so claw fixture does not contact sample. 10 Slowly let the claw fixture contact the sample. 11 Turn the switch ON and scratch from left to right. 12 When scratching to the extreme right end hold the arm upward and sepa
26、rate the nail jig from the sample. 13 Rotate the nail feed handle 180 degrees 2 pitches to the right side. 14 When specimen base has moved to the right side slowly lower the claw fixture and contact the sample. 15 Repeat steps 11 to 14 and scratch more than 17 times. 16 After test needle tip shall b
27、e protected to prevent wearing. Remove the needle and protect the needle tip by covering with fabric etc. If the needle has been mounted on the testing machine lift up and fix the arm. 8.3 Method C 1 Confirm in advance that the test condition conforms to Table 4. 2 Apply double-sided tape on the sam
28、ple mount of seat belt tongue scratch test equipment. 3 Take off the reverse side paper of the double-sided tape and set the sample on the sample mount. 4 Raise the pendulum up to the specified height. 5 Take off the pendulum so that it strikes the sample. 6 Take off the sample slide it horizontally
29、 10 mm and apply it again. 7 Repeat steps 4 to 6 and strike five times or more. M0159 2005-1 - 4 - Figure 1 Crosscut adhesion testing machine NeedleNeedle feed handle Scratching direction Specimen baseSampleNeedleMotor Arm Weight Balance weight Figure 2 Tungsten steel needle Figure 3 Claw fixture En
30、larged view A Moving directiondamage Material SUS304 R2.0 Enlarged view AEnlarged view BM0159 2005-1 - 5 - Figure 4.1 Seat belt tongue scratch testing machine illustration 45 Point of support 0.05m 0.935 mm 34.4 Arm crosscut 29 mm 3.0 mm Arm made of 52S aluminum or a similar substance Arm and tongue
31、 are fixed using wire or a similar item. Seat belt tongueSample Fixed mount Figure 4.2 Seat belt tongue scratch testing machine entire body Figure 4.3 Seat belt tongue scratch testingmachine impact section UPR LH M0159 2005-1 - 6 - 9. JUDGEMENT 9.1 Method A Judgement method Judge the test specimens
32、before and after the test under the standard light source and express the extent of color degradation in the gray scale rating grades by using the gray scale specified in JIS L 0804 Grey scale for assessing change in colour. Judgement shall be made in both the horizontal and vertical scratch directi
33、ons. If the scratched surface is difficult to observe due to irregular reflection of light the angle of test specimen can be changed as necessary to be visible enough to allow judgement. Note the distance between the specimen surface and the eyes of inspector shall be 20 to 30 cm. Report Express the
34、 color degradation of test specimens in the corresponding gray scale rating grades. If an evaluation result is between the two rating grades it shall be expressed as 4.5 grade. Number of persons for evaluation: The evaluation shall be performed by 3 or more persons and the grade is decided by the av
35、erage mark. Table 5 Grade Judgement standard 5 grade Whitening cannot be recognized. 4 grade Whitening is slightly recognized. 3 grade Whitening is recognized. 2 grade Whitening is prominent. 1 grade Whitening is especially prominent. 9.2 Method B Judgement method After the test by comparison with t
36、he sample plate KM2 produced under ordinary light judge the gloss increments by points. Report Express the gloss increments of the test specimens by points. If an evaluation result is between the two rating points it shall be expressed as 4.5 points. Number of persons for evaluation: The evaluation
37、shall be performed by 3 or more persons and the grade is decided by the average mark. Table 6 Point Judgement standard 5 points Gloss increment is not recognized. 4 points Gloss increment is slightly recognized. 3 points Gloss increment is recognized. 2 points Gloss increment is prominent. 1 point G
38、loss increment is especially prominent. 9.3 Method C Judgement method After the test by comparison with the sample plate under ordinary light judge the gloss and whitening increment by points. Report Express the gloss increments of the test specimens by points. If an evaluation result is between the
39、 two rating points it shall be expressed as 4.5 points. Number of persons for evaluation: The evaluation shall be performed by 3 or more persons and the grade is decided by the average mark. Table 7 Point Judgement standard 5 points Gloss increment is not recognized. 4 points Gloss increment is slig
40、htly recognized. 3 points Gloss increment is recognized. 2 points Gloss increment is prominent or whitening is observed. 1 point Gloss increment is especially prominent or whitening is prominent. M0159 2005-1 - 7 - 10. JUDGEMENT CRITERIA As specified in Tables 8 9 and 10. 10.1 Interior polypropyrene
41、 resin parts Table 8 Criteria of each test method Test method Criterion Method A: 175g Equivalent to or greater than 2.5 grade for each color Method A: Tungsten steel needle 10.2 High-impact polypropyrene resin parts Table 9 Criteria of each test method Test method Criteria Method A: 175g Equivalent
42、 to or greater than 2.5 grade for each color Method B: 500g Equivalent to or greater than 3 points for each color Method A: Tungsten steel needle Method B: claw fixture 10.3 FIN ASSY DOOR GARN ASSY-CTR PLR LWR. GARN ASSY CTR PLR UPR Table 10 Criteria of each test method Test method Criteria 1 Criter
43、ia 2 Method A: 175g Equivalent to or greater than 2.5 grade for each color Equivalent to or greater than 4.5 grade for each color Method B: 500g Equivalent to or greater than 3 points for each color Equivalent to or greater than 3 points for each color Method C: 0.534 J Equivalent to or greater than
44、 3.5 points for each color Equivalent to or greater than 3.5 points for each color Method A: Tungsten steel needle Method B: claw fixture Method C: Seat belt tongue Criterion 1: Applied to mass production vehicles and development vehicles where the performance target was set before April 1 2005 Crit
45、erion 2: Applied from the development vehicles of which performance target is set on and after April 1 2005 M0159 2005-1 - 8 - ANNEX 1. Outline of latest revision Add details of the needle profile used in method A and add details of the needle storage method. 2. Revision details Method A had been pr
46、escribed as involving evaluation using the needle fitted to a cross-cut adhesion test machine. However it was difficult to obtain the needle in areas where the test machine was not readily available. Details of the needle have been therefore added based on the tungsten needle used in Japanese test m
47、achines. Details of how to store the needle have also been added as the needle tip is easily deformed. ANNEX 2004 revision 1. Outline of previous 2004 revision It had been assumed that the target of zero complaints set for the scratch resistance of interior trim would ensure competitiveness with oth
48、er vehicles but this has been highlighted as a source of dissatisfaction among customers in IQS scores in recent years. This revision involved reviewing quality standards by researching market requirements to eliminate dissatisfaction and reevaluating competitiveness with other vehicles. 2. Review o
49、f assessment methods Investigations into the types of flaws seen on interior trim components in vehicles on the market showed that there were no flaws other than those discovered by methods A B and C. 3. Review of evaluation methods The reference was clarified for when sample plates are required. Sample plates at each site are controlled at NTC: Material Technology Dept. XM4 NTC-NA: 4020 - Body Systems Design and NTC-E: DN2. 4. Review of quality standards Market surveys in Japan revealed that blushing were prominent on the FIN ASSY DOOR GARN ASSY-CTR PLR LWR GARN A
