1、March 2017 English price group 9No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 85.060!%bVm“2635174www.din.deDIN IS
2、O 5630-5Paper and board Accelerated ageing Part 5: Exposure to elevated temperature at 100 C (ISO 56305:2008),English translation of DIN ISO 5630-5:2017-03Papier und Pappe Beschleunigte Alterung Teil 5: Beanspruchung bei einer erhhten Temperatur von 100 C (ISO 56305:2008),Englische bersetzung von DI
3、N ISO 5630-5:2017-03Papier et carton Vieillissement acclr Partie 5: Exposition une temprature leve 100 C (ISO 56305:2008),Traduction anglaise de DIN ISO 5630-5:2017-03www.beuth.deDocument comprises 13 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be con
4、sidered authoritative.02.17 A comma is used as the decimal marker. Contents Page Introduction.5 1 Scope6 2 Normative references6 3 Principle6 4 Apparatus.6 5 Calibration and preparation of tubes for ageing7 5.1 Calibration of the oven7 5.2 Preparation of glass tubes for ageing.7 6 Sampling.7 7 Condi
5、tioning 8 8 Preparation of test pieces.8 9 Procedure.8 9.1 Ageing of test pieces 8 9.2 Removal and equilibration of the aged test pieces .8 9.3 Testing of aged and unaged papers9 10 Calculations .9 11 Test report10 Annex A (informative) Interpretation and limitations of test 11 Annex B (informative)
6、 ASTM permission statement .12 Bibliography13 DIN ISO 5630-5:2017-03 2National foreword . National Annex NA (informative) Bibliography . 34National foreword This document (ISO 5630-5:2008) has been prepared by Technical Committee ISO/TC 6/SC 2 “Test methods and quality specifications for paper and b
7、oard” (Secretariat: SIS, Sweden). The responsible German body involved in its preparation was DIN-Normenausschuss Papier, Pappe und Faserstoff (DIN Standards Committee Paper, Board and Pulps), Working Committee NA 074-02-03 AA Physikalisch-technische Prfverfahren fr Papier und Pappe. Attention is dr
8、awn to the possibility that some of the elements of this document may be the subject of patent rights. DIN shall not be held responsible for identifying any or all such patent rights. DIN ISO 5630 consists of the following parts, under the general title Paper and board Accelerated ageing: Part 1: Dr
9、y heat treatment at 105 C Part 3: Moist heat treatment at 80 C and 65 % relative humidity Part 4: Dry heat treatment at 120 or 150 C Part 5: Exposure to elevated temperature at 100 C Part 6: Exposure to atmospheric pollution (nitrogen dioxide) Part 7: Exposure to light NOTE ISO 5630-2, Paper and boa
10、rd Accelerated aging Part 2: Moist heat treatment at 90 C and 25 % relative humidity was withdrawn by ISO in 1992. Thus, there is no corresponding Part 2 as a DIN ISO Standard. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 186 DIN EN
11、ISO 186 ISO 638 DIN EN ISO 638 ISO 1974 DIN EN ISO 1974 ISO 216 DIN EN ISO 216 ISO 1924-2 DIN EN ISO 1924-2 ISO 1924-3 DIN EN ISO 1924-3 DIN ISO 5630-5:2017-03 3 National Annex NA (informative) Bibliography DIN EN ISO 186, Paper and board Sampling to determine average quality DIN EN ISO 216, Writing
12、 paper and certain classes of printed matter Trimmed sizes A and B series, and indication of machine direction DIN EN ISO 638, Paper, board and pulps Determination of dry matter content Oven-drying method DIN EN ISO 1924-2, Paper and board Determination of tensile properties Part 2: Constant rate of
13、 elongation method (20 mm/min) DIN ISO 1924-3, Paper and board Determination of tensile properties Part 3: Constant rate of elongation method (100 mm/min) DIN EN ISO 1974, Paper Determination of tearing resistance Elmendorf method DIN ISO 5630-5:2017-03 4 Introduction Exposure of paper or board to a
14、 hostile environment, such as some type of radiation, elevated temperature or chemical attack over a period of hours can provide information concerning the natural changes that may occur in the material over a period of years. The test method described in this part of ISO 5630, for accelerated agein
15、g by exposure of moist paper to an elevated temperature, is based on the method developed by ASTM6following an extensive research programme. In this programme, 15 printing and writing papers were tested, representing a wide variety of paper types (acid and alkaline, lignin-containing and lignin-free
16、, and those without an alkaline reserve such as calcium carbonate). This test method proved to give more accurate results than earlier methods regarding the effect of elevated temperature on the mechanical strength and optical stability of such papers. For a full understanding of the stability of th
17、e permanence of the paper, a combination of test methods for accelerated ageing should be used. Paper and board Accelerated ageing Part 5: Exposure to elevated temperature at 100 C DIN ISO 5630-5:2017-03 5 1 Scope This part of ISO 5630 specifies a method for accelerating the ageing of printing and w
18、riting papers, through the use of elevated temperature, and assessing its effect on the mechanical properties of fold number and tearing resistance, for the purpose of predicting stability to long-term natural ageing. It is applicable to all cellulose-based printing and writing papers, including coa
19、ted papers and filled papers. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) appli
20、es. ISO 186, Paper and board Sampling to determine average quality ISO 187, Paper, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples ISO 638, Paper, board and pulps Determination of dry matter content Oven-drying
21、method ISO 1974, Paper Determination of tearing resistance (Elmendorf method) ISO 5626, Paper Determination of folding endurance 3 Principle Conditioned paper samples are placed inside airtight glass tubes and aged at an elevated temperature for a certain time. By comparing fold number and tearing r
22、esistance before and after the ageing, a measure of the stability of paper strength is obtained. 4 Apparatus 4.1 Laboratory forced-ventilation oven, capable of maintaining a uniform temperature of 100,0 C 1,0 C, with sufficient racks to allow horizontal orientation of glass tubes. 4.2 Airtight glass
23、 tubes, of sufficient internal height to accommodate the test pieces. The internal volume shall be of a convenient magnitude to meet the mass of test pieces per internal volume of tube specification (see Clause 8). The tubes shall have screw-on caps, fitted with O-rings or gaskets that ensure a herm
24、etic seal of the interior contents during the ageing. The materials (glass, cap and O-ring or gasket) should be thermally stable at, or preferably well above, the ageing temperature of 100 C, and chemically resistant to acid corrosion. DIN ISO 5630-5:2017-03 6 4.3 Balance, accurate to 0,01 g, for we
25、ighing test pieces and, when required, additional portions of sample to ensure that the required mass of sample per unit volume of tube is met (see 9.1). 4.4 Device for cutting additional portions of sample, when required, to meet the required mass of sample per unit volume of tube (see 9.1). 5 Cali
26、bration and preparation of tubes for ageing 5.1 Calibration of the oven Calibrate the oven with sufficient frequency to ensure a temperature of 100,0 C 1,0 C. 5.2 Preparation of glass tubes for ageing 5.2.1 Used glass tubes Prior to the insertion of test pieces, thoroughly clean used glass tubes. Th
27、e required cleaning sequence is as follows. a) Wash tubes thoroughly with non-ionic detergent and tap water. b) Rinse tubes thoroughly with tap water to remove all residual soap. c) Rinse three more times with distilled water and allow the tubes to drain. d) Dry the tubes in an oven at about 105 C.
28、e) Condition the complete tube assembly (opened) for a minimum of 24 h in the atmosphere used for conditioning the paper samples (Clause 7). 5.2.2 New glass tubes When starting with new tubes, caps, O-rings or gaskets, dry them at 105 C for at least 24 h. Condition the complete tube assembly (opened
29、) for a minimum of 24 h in the atmosphere used for conditioning the paper samples (Clause 7). 5.2.3 Storage of tubes After conditioning, cap the tubes and maintain them capped until use. 6 Sampling Always handle the paper samples with clean cotton gloves. If the average quality of a lot is to be det
30、ermined, sampling shall be carried out in accordance with ISO 186. If another type of sample is to be tested, make sure that the specimens taken are representative of the sample received. If the sheets are much larger than A4 in size1, cut them into sheets approximately A4 in size. If possible, rand
31、omize the sheets. Select enough sheets for testing of aged and unaged paper, including additional material sufficient to meet the required mass of sample per unit volume of tube (9.1) and to allow for invalid tests. If the sheets are less than A4 in size, select a similar area of paper sufficient fo
32、r the tests to be performed. DIN ISO 5630-5:2017-03 7 7 Conditioning Condition the sheets, including those which will not be aged, in accordance with ISO 187 immediately prior to the ageing period. The sheets which will not be aged shall be kept in the standard atmosphere until their properties are
33、tested. 8 Preparation of test pieces From the sheets, cut the required number of test pieces of the appropriate dimensions for the tests to be performed on both unaged and aged material (see 9.3). Follow the instructions in ISO 1974 for preparation of test pieces for tearing resistance and the instr
34、uctions in ISO 5626 for folding endurance (fold number). NOTE It may be advisable to cut additional material to allow for invalid tests, see ISO 1974 and ISO 5626. Determine the dry matter content of the conditioned sheets in accordance with ISO 638, and calculate the oven-dry mass. 9 Procedure 9.1
35、Ageing of test pieces Calculate the number of airtight glass tubes (4.2) needed such that each tube will contain (0,027 8 0,000 07) g of oven-dry sample per cubic centimetre internal volume of tube. If the calculation does not give an integer number, select the next highest number. Insert the materi
36、al to be aged into the glass tubes such that each tube contains approximately the same mass of paper. Pieces which form the tearing resistance test pieces should be rolled together prior to insertion and then inserted in the tubes. The fold-number test pieces should then be inserted inside these. If
37、 the mass of oven dry sample per unit volume of tube is lower than that specified (after selecting the appropriate number of glass tubes), cut additional portions of sample and add to the tubes as required to comply with the specification. As an example, a tube of (145 5) cm3internal volume shall co
38、ntain (4,0 0,1) g (oven-dry mass) per tube. Three tubes of this size may be sufficient for test pieces for fold number and for tearing resistance. The actual number of tubes and the need for additional portions to make up the required grams per cubic centimetre of volume depend on the oven-dry gramm
39、age of the sample, the specific dimensions of the test pieces and the number of pieces per test. Put the caps into place on the tubes and secure (hand-tight) to provide a complete seal. Mark the exterior of the glass tubes for identification of the paper samples inside. Insert loaded tubes into the
40、heated oven (4.1) and place them one layer deep on each rack. Age the test pieces for (120 0,5) h. 9.2 Removal and equilibration of the aged test pieces Upon removal from the oven, allow the hot tubes to equilibrate unopened to room temperature for a minimum of 1 h. Note any observable differences i
41、n the appearance of samples, without uncapping them. IMPORTANT If the samples in some tubes have a lighter colour than the original samples, the tube may not have been airtight. Such samples shall be discarded. Uncap the tubes in the same standard atmosphere as that used to initially condition the t
42、est specimens (Clause 7), and then allow the test pieces to equilibrate for at least 24 h in the tubes. Remove the additional portions of sample, if applicable, and the test pieces with tweezers, taking care to assure that no creases or folds are made in the test pieces. DIN ISO 5630-5:2017-03 8 Car
43、efully unroll the individual pieces comprising the tearing resistance test pieces and place them on a flat, clean, inert surface. Cover the individual pieces with a sheet of glass or acrylic plastic. In order to provide a total weight of approximately 1 kg applied evenly over the full surface of the
44、 pieces, add weight at the top of the sheet of glass or acrylic plastic, as required. Leave the weight in place for at least 12 h, then carefully remove any additional weight and the sheet of glass or acrylic plastic from the pieces. The uniform, low-pressure application of force on the surface of t
45、he tearing-resistance test pieces is required to reduce the curl at the time of their testing. Allow the test pieces to reach equilibrium in the same atmosphere as used for the initial conditioning (Clause 7). 9.3 Testing of aged and unaged papers Test the tearing resistance of the aged and unaged p
46、apers in the cross direction (CD) in accordance with ISO 1974, and fold number in the machine direction (MD) in accordance with ISO 5626. 10 Calculations Calculate the results in accordance with the instructions in the relevant ISO standard. Calculate the retention of the fold number, to the nearest
47、 percentage, using Equation (1): 211100FRF= (1) where R1is the retention of fold number, as a percentage; F2is the fold number (MD) of the aged sample; F1is the fold number (MD) of the unaged sample. Calculate the retention of the tearing resistance, to the nearest percentage, using Equation (2): 221100TRT= (2) where R2is the retention of the tearing resistance, as a percentage; T2is the tearing resistance (CD) of the aged sample; T1is the tearing resistance (CD) of the unaged sample. DIN ISO 5630-5:2017-03 9
