FOURDRINIER KRAFT BOARD INSTITUTE, INC.

Transcription

1 i :,. i l.:.. i,,,,. CONTNUOUS EVALUATON OF CORRUGATNG MEDUM Project 8-7 Progresst Reaport 8 to FOURDRNER KRAFT BOARD NSTTUTE, NC. January,96

2 SCRAMBLED CODE ETTERS FOR PROGRESS REPORT 8 PROJECT 8-7 The Chesapeako Corporation - Machine Code Company - Mill No. Letter West Point Continental Can Company, nc. - Hopowell F - Hodge U Crown Zellerbach Corporation - Baltimore C - Baltimore 2 Q - Bogalusa 4 K - Lebanon 2 T nternational Paper Company - Bastrop M - Bastrop Georgetown - Georgetown 2 - The Mead Corporation - Harriman - Knoill - Lynchburg 2 D - Sylva A St. Regis Container Corporation Mill Division - Coshooton North Carolina Pulp Company - Plymouth 3 B Olin Mathieson Chemical Corporation - Monroe -- - Monroe 2 - Owens-llinois Glass Company - Tomahawk H - Tomahawk 2 P - Tomahawk 3 E - Big sland - - Big sland Big sland 3 L St. Joe Paper Company - Port St. Joe R Union Bag-Camp Paper Corporation - Savannah 2 5 West Virginia Pulp and Paper Company - Covington 6 J -lcovington 7 - Charleston - -

3 THE NSTTUTE OF PAPER CHEMSTRY Appleton, Wisconsin ^'' CONTNUOUS EVALUATON OF CORRUGATNG MEDUM Project 8-7 Progress Report 8 to FOURDRNER KRAFT BOARD NSTTUTE, NC. January 96

4 TABLE OF CONTENTS ii SUMMARY PURPOSE OF THS STUDY 5 PROCEDURE FOR PARTCPATNG 5 PRESENTATON AND DSCUSSON OF TEST RESULTS OBTANED AT THE NSTTUTE OF PAPER CHEMSTRY 6 Page Number of Rolls of Corrugating Medium Submitted for Evaluation from Each Machine 7 Summary of Current Machine Averages for December, 96 Showing Also the Current and Cumulative F.Ko. Averages 9 Graphical Presentation of Basis Weight and Caliper Data Graphical Presentation of Concora Flat Crush Data and Single-Face Flat Crush Data Summary of Test Results for December, 96 Machine A 5 Machine B 5 Machine C 6 Machine D 6 Machine E 7 Machine F 7 Machine G 8 Machine H' 8 Machine 9 Machine J 9 Machine K 2 Machine L 2 Machine M 2 Machine N 2 Machine 22

5 TABLE OF CONTENTS--CONTNUED iii Page PRESENTATON AND DSCUSSON OF TEST RESULTS OBTANED AT THE NSTTUTE OF PAPER CHEMSTRY--Continued Summary of Test Results for December; 96--Continued Machine P 22 Machine Q 23 Machine R 23 Machine S 24 Machine T 24 Machine U 25 DSCUSSON OF CONCORA FLAT CRUSH TEST RESULTS OBTANED AT THE NSTTUTE OF PAPER CHEMSTRY AND THOSE OBTANED AT THE MLLS 26 Comparison of nstitute and Mill Concora Results on ndividual Rolls for December, A Comparative Summary for Each Machine of the Concora Flat Crush Averages Based on nstitute Data and Those Based on Mill Data 29 A Tabulation for Each Machine of the Average Difference (per cent) Between the Concora Flat Crush Average Based on nstitute Data and That Based on Mill Data (Corresponding Data for the Two Previous Periods are Also Shown) 29

6 THE NSTTUTE OF PAPER CHEMSTRY Appleton, Wisconsin SUMMARY The purpose of this study is to provide a continuous evaluation of the quality and runability of the corrugating mediums manufactured by members of the Fourdrinier Kraft Board nstituteo The program is implemented in the following ways Two rolls of corrugating medium are submitted on a weekly basis from the production of each machine Each roll is evaluated for basis weight, caliper, Concora flat crush (conditioned after fluting)" and runability, the latter being measured by corrugating.each roll under standardized conditions into A-flute board at 6 feet per minute with minimum tension f runability is unsatisfactory at this speed, the speed of the corrugator is reduced by increments of 25 fopomo until satisfactory runability is obtained as indicated by the absence of ruptured flutes f the runability is satisfactory at 6 fopomo with minimum tension, the tension is increased by increments of /2 lbo per ino to determine the maximum tension at which satisfactory runability is obtained The maximum tension used is lbo per ino Flat crush tests are made on the singlefaced board obtained at the maximum speed with minimum tension n addition to the evaluation carried out at the nstitute as described above, each participant may 9 if he so desires 9 evaluate each roll of corrugating medium for Concora flat crush (conditioned after fluting) and submit the results to The nstitute of Paper Chemistry, thus providing an opportunity to include a comparison of nstitute and mill Concora flat crush results in the monthly progress reports

7 Fourdrinier Kraft Board nstitute, nco Page 2 Project 8-7 ) Progress Report 8 The study' as described in the preceding paragraphs 9 provides several important benefits For example, it enables each participant to evaluate his quality position in relation to the rest of the industry on a continuing basis n addition, it provides a basis for comparing Concora flat crush results obtained at the nstitute with those obtained at the mills on corresponding rolls of medium This type of comparison is a helpful adjunct to conventional calibration procedures Another benefit is provided by virtue of the fact that the study is accumulating an evergrowing reserve of background information essential for the judicious interpretation of any proposed specifications on corrugating medium whether on a company or industry basis During the month of December' 89 rolls of corrugating medium were submitted to The nstitute of Paper Chemistry from the production of twentyone machines Shown below are the maximum and minimum current machine averages noted for each test during December (the current machine average is the average of the results obtained on all rolls submitted from a given machine during the current period); also given for each test is the current FoKoo average which is determined by averaging the current machine averages and is indicative of the test level being maintained by the industry as a whole to the extent that the industry is represented by the participating machines

8 Fourdrinier Kraft Board nstitute, nco Page 3 Project 8-7 Progress Report 8 Maximum Minimum Current Current Current Machine Machine FAKoo Average Average Average Basis weight, lbo ,2 Caliper, pt. o3 9o4.4 Concora flat crush, posoio (Conditioned after fluting) Single-face flat crush, posoio ' The runability data for the 89 rolls of medium evaluated during December are summarized as follows Number of Percentage of Runability Rolls Total Rolls Less than 6 fopomo with minimum tension f.p.m. with minimum tension 3 4o6 6 fopom. with tension of /2 lbo per ino 2 23o6 6 fopom. with tension of lbo per ino 7 9ol 6 fopomo with tension of lbo per ino 35 39o3 Concora flat crush results obtained on specimens conditioned after fluting were submitted for fifteen of the twenty-one machines from which rolls were received during the current month The comparisons of Concora flat crush test results based on the average result obtained at the nstitute and at the mill for all rolls compared for each machine are summarized below Shown in this summary is the number of machines (and the percentage of the total machines which they represent) whose Concora test averages fall within the indicated percentage ranges from the results obtained at the nstitute on the same rolls

9 Fourdrinier Kraft Board nstitute, nc. Project 8-7 Page 4 Progress Report 8 Average Percentage Difference Between nstitute and Mill Concora Flat Crush Test Resultsa Number of Machines Percentage of All Machines a The average obtained at the nstitute was used as the reference in the calculation of the percentage differences

10 Fourdrinier Kraft Board nstitute, nco Page 5 Project 8-7 Progress Report 8 CONTNUOUS EVALUATON OF CORRUGATNG MEDUM PURPOSE OF THS STUDY The purpose of this study is to provide a continuous evaluation of the quality and runability of corrugating medium produced by members of the Fourdrinier Kraft Board nstituteo The study, as it progresses, is accumulating a backlog of data and experience which provides several important benefits. For example, it enables each participant to evaluate his position in relation to the rest of the industry n addition, it provides background information essential for the judicious interpretation of any proposed specifications on corrugating medium (on either a company or industry basis)o The program also provides a basis for comparing Concora results obtained at " the nstitute with those obtained at the mills on corresponding rolls of medium. This comparison is a helpful adjunct to conventional calibration procedures. PROCEDURE FOR PARTCPATNG The procedure for participating in this study involves the submission of two rolls of corrugating medium per week from each machine to The nstitute of Paper Chemistryo These rolls are taken from regular production runs on different days Each roll is to 2 inches wide and contains approximately 5, lineal feet of medium (approximately 3 inches in diameter)o When received by the nstitute' each roll is assigned a code letter and number. The rolls are numbered in the sequence in which they are received Code letters are assigned on the basis of machines and a given machine is assigned

11 Fourdrinier Kraft Board nstitute' nco Page 6 Project 8-7 Progress Report 8 a different code letter each month in order to mask the identity of the mills For purposes of reference, an outline of this program which describes the necessary instructions for sampling was appended to Progress Report One in this series PRESENTATON AND DSCUSSON OF TEST RESULTS OBTANED AT THE NSTTUTE OF PAPER CHEMSTRY During the month of December, eighty-nine rolls of corrugating medium were selected from the production of twenty-one machines and submitted to The nstitute of Paper Chemistry for evaluation A tabulation of the number of rolls submitted from each machine is given in Table o Each sample of corrugating medium was evaluated for basis weight, caliper, Concora flat crush (conditioned after fluting), Ho and Do flat crush (single-faced board), and runabilityo (Concora flat crush results obtained on specimens tested immediately after fluting were included in Progress Reports 45 through 57) Runability was measured by corrugating each roll under standardized conditions on the nstitutevs corrugator into A-flute board at.6 feet per minute with minimum tension f unsatisfactory runability occurred at this speed, the corrugator was slowed down in increments of 25 fopomo until satisfactory runability was obtained (no ruptured flutes)o f the medium fabricated satisfactorily at 6 fopomo with minimum tension, further runs were made at higher tensions to determine when cracking occurred The higher tensions used were O5 lbo per inch, loo lbo per inch, and lo5 lb. per inch

12 Fourdrinier Kraft Board nstitute, nco Project 8-7 Page 7 Progress Report 8 TABLE NUMBER OF ROLLS OF CORRUGATNG MEDUM SUBMTTED FOR EVALUATON FROM EACH MACHNE Machine Code A B C D E F G H J K L M N P Q R S T U Total Number of Rolls 4 4,

13 Fourdrinier Kraft Board nstitute, nco Page 8 Project 8-7 Progress Report 8 Flat crush was determined on the board obtained at a speed of 6 f.p.mo with minimum tension n addition to information about quality" these results will provide data which may be useful in studying the relationship between Concora flat crush and combined board flat crush for each participant's mediums As requested by members of the FoKoBoo. the Concora medium test results are calculated on the basis of pounds of load per unit area rather than on the basis of the formula suggested by the Concora manufacturer and are reported as Concora flat crush test results n Progress Reports One and Two, the Concora medium test results were reported on the basis of the formula suggested by the Concora manufacturer The average test results obtained on the rolls of corrugating medium submitted by each participant (current machine averages) are shown in Table and graphically presented in Figures to 4o n addition to a comparison of the test data obtained for the various machines Table also presents the current FoKolo averages" cumulative FoKolo averages 9 and the FK., indexes The current FoKoo average is the average of test results for all machines participating in the study during the current month The cumulative F.Ko, average is based on the results for the previous twelvemonth period excluding the result for the current period The FoKoo index is obtained as follows: current FoKoo average x - FoKoo index (%) cumulative F.K.* average The F*.Ko index provides a ready means of comparing the current quality with previous results An index greater than % indicates that current *)

14 4 P TABLE SUMMARY OF CURRENT MACHNE AVELA(ES, December, 96 H CD Code Basis Weight,- lb. C4iper, points Concora Flat Crush, POs.. Single-Face Flat Crush' p.s.i. Cl- A B C D E F G H * P '-4. J K L a N N P , , Q R S T U Current F.K.o Average Cumulative F.Koe Average F.K.. ndex; % ,4 3 o , _ No dataa ,. ' 's co Ca CD H a See Table XXo

15 Fourdrinier Kraft Board nstitute, nc. Project 8-7 Page Progress Report 8 29 ~- ~r J 27 _ i l _ 7! i i - Av Figure. Comparison of Basis Weight Results for December, 96. ~ C.) 4_J -- - "Av. F.K.. Figure 2. Comparison of Caliper Results for December, CuCurrent machine average Cumulative machine average

16 Fourdrinier Kraft Board nstitute, nc. Project 8-7 Page Progress Report 8 4r ' 38t' i 3. ; O 3 - -l UG: 3.J zvi ll V) 28 Figure 3. Comparison of Concora Flat December, 96 - ~ -Mach.~~~ ABC~ Mach. A B C rn i n rn Crush Results for r- l rn DE FG H J K L M N OPQR STU Figure 4. Comparison of Single-Face Flat Crush Results for December, Current 'machine average - ---Cumulative machine average rn r" i F.K.. Av.

17 Fourdrinier Kraft Board nstitute, nco Page 2 Project 8-7 Progress Report 8 quality is higher than the average result for the previous twelve periods; an index below % indicates that current quality is lower than the average result for the previous twelve periodso n Table the current machine averages for the month of December are summarized. t may be noted in Table and Figure that basis weight varied from a low of 26 lbo for Machine U to a high of 28o7 lb. for Machines B and Co The current FoKoo average for basis weight was 27.2 lb.; which was slightly lower than the cumulative F.Koo average of 27o4 lbo Of the current machine averages shown in Table none were below the 26-lb. minimum requirement of Rule 4o On the basis of individual rolls, it may be noted that the tabulated data for each machine shown in Tables through XX included three basis weight averages which were below 26 lbo With regard to the caliper results for the current period" it may be seen in Table and also in Figure 2 that the lowest current machine average of 9.4 points was associated with Machine R' and the highest average of,3 points was associated with Machine Ao The current FoKoo average of.4 points was slightly higher than its cumulative FoKoo average of.3 pointso The minimum caliper requirement of nine points specified in Rule 4 was met by all participants on the basis of the current machine averages shown in Table o On the basis of individual rolls- there were two caliper averages below 9 points The Concora flat crush averages are presented graphically in Figure 3 based on the data in Table o An inspection of these results reveals that 38.7 p.s.io was the highest average and 29ol posoio the lowest

18 Fourdrinier Kraft Board nstitute, nco Project 8-7 Page 3 Progress Report 8 Machine G had the highest average, whereas Machine C had the lowest average. The current F.K.. average of 35. posoio was somewhat lower than the cumulative F.Ke. average of 363 posoio The highest single-face flat crush average of 357 p.s.io was obtained on the medium from Machine M and the lowest of 25o4 pos.io on the medium from Machine Co graphically in Figure 4o These data are shown in Table and are presented The current FoKoo average was 33 p.s.io, which was the same as the cumulative F.KoA averages The runability data for the 89 rolls of medium evaluated during December are summarized as follows Runability Less than 6 f.p.mo with minimum tension 6 f.p.m. with minimum tension 6 f.p.m with tension of /2 lbo per ino 6 fop.m. with tension of lbo per ino 6 f.poem with tension of lbo per ino Number of Percentage of Rolls Total Rolls o For the current period, the current FoKoo average for caliper was slightly higher than its respective cumulative FoKoo average whereas the current FoKoo averages for basis weight and Concora flat crush were slightly lower than their cumulative FoKo. averages and the current FoKo average for single-face flat crush was the same as its cumulative FoKoo average.

19 Fourdrinier Kraft Board nstitute, nco Page 4 Project 8-7 Progress Report 8 The test results obtained on the sample lots submitted from the production of each of the machines are shown in Tables through XX for Machines A through U, respectively The maximum, minimum, and average test results obtained on each sample lot are shown for all tests except basis weight for which only the average is shown; in addition, the over-all average result for all sample lots submitted from a given machine is shown for each test. The latter over-all averages are reported as "current machine averages." A cumulative machine average is also shown and is calculated by averaging the current machine averages for the previous twelve periods (excluding the current period)o Also shown for each machine in Tables to XX are the machine factor and machine index which are defined as follows current machine average x - machine factor (%) cumulative machine average current machine average x - machine index (%) cumulative FoKo. average The machine factor and machine index provide a means for comparing the current machine average with either the previous results for that particular machine or with the cumulative results for all machines--ioeo 9 the cumulative F.K.o average*

20 v 6~~~~~~~~~~t.4 TABLE SUMKARY OF' TEST RESULTS FOR MACHNE A - ~~December, 96 ~ r_ H oil A-i A-2 A-3 A-4 Made Recd. Mill Roll No Basis Weight, lb. per sq. ft Caliper, points, Max. Min Concora Flat CQrush, pose ie Av. Max. Min Single-Face FlE~t Crush, p.s.i. Av. Max. Min Av Runability, maxdimum Tension at 63 f.pem., ib./in. HN -.4 ) ) *. Ca Ct- Current Machine Average Cumulative Machine Average Machine Factor, % Machine ndex. % * * C+, C) TARLE D SUMMARY OF TEST RESULTS FOR MACHNE B December, 96 B Current Machine Average Cumulative.Machine Average Machine Factor, % YMachine ndex, % *5 28.* l * ~ * * *9-32 " OQ CD * OQa Clt- CD

21 4t Code c- C-2 C-3 C-4 C-5 C-6 Made Reed Mli Roll Noo Basis Weight, lb. per sq. ft TABLE V SUMMARY OF TEST RES.ULTS FOR MAC~HNE C December, 96 Caliper, Concora Flat Crush, points pos~i. Max. Mmn. Av. Max. Min. Av* * *7.5.* * * Single-Face Flat Crush, posei. Max. Min. AlF * * Runability, maximum Tension at 6J f.pom., lb,/in. H j co,~ H 4) ) * H Cl- 4 r_ + Current Machine Average Cumulative Machine Average Machine Factor. % Machine ndex, % * TABLE V SUMMARY OF TEST RESULTS FOR MACHNE December, 96 D D- D-2 D-3 D * la * UQ CD Current Machine Average Cumulative Machine Average Machine Factor, % Machine ndex. % ' C- O8 H po

22 4 5 TABLE V SUM[ARY OF TEST RESULTS FOR MACHNE E December. 96 * CD EC. * Code E- E-2 E-3 E-4 -ade Reed Current Yachine Average Cumulative Mlachine Average Machine Factor, % Machine ndex. % Mili Roll No* Basis Weight, lb. per sq. ft Caliper, points Max. Mini Concora Flat Crush, p*s.i. Ave Max. Mini. Ave Single-Face Flat Crush, p.s.i. Max. Mini. Ave Runability, Maximum Tension at 6) fopem., lb, /in. /2 / Cl- CD * 4- CO CD s (a TABLE V SUMMARY OF TEST RESULTS FOR MACHNE F December, 96 F-i F-2 F-3 F-4 F ~ o a.8.7.' /2 /2 /2 * ' CD Current M,achine Average Cumulative Machine Average 'Machine Factor, % Machine ndex, % CD.c- Cl C '-'-.

23 4 -y TABLE XX SUNMARY OF TEST RESULTS FOR MACHNE G December, 96 * r Cs.. 5 Code Made Recd. Mill Roll No. Basis Weight, lb. per sq. ft. Caliper, points Max. Min. Concora Flat Crush, p~sei. Av. Max. Min. Av. Single-Face Flat Crush, posoi. Max. Min. AV. Runability, Maximum Tension at 6) f~pem., lb./in. C.5-4 Ca -,. G- G-3 G * * * Min. Min. Min. '-4 i C3 ) Current Machine Average Cuniulative Machine Average Machine Factor, % Machine ndex, % * TABLE X SUMMARY OF TEST RESULTS FOR MACHNE H December. 96 H- H-2 H-3 H Current Machine Average Cumulative Machine Average Machine Factor, % Machine ndex, % * la * 9 La to C.' 9

24 4.~~~~~~~~~~~~~- * -a.4 w TABLE X SUMMARY OF TEST RESULTS FOR MACHNE December, H - Code Made Recd. Mill Roll No, Basis Weight, lb. per sq. ft. Caliper, points Max. Min. Concora Flat Crush, pes.i. Ave Max. Min. Av. Runability, maximum Single-Face Flat Tension at Crush, p.s.i. 6).pem., Max. Min. Av. lb./in. CD ~. '-4 CD C,. C'a , CD Current Machine Average Cumulative Machine Average Machine Factor, % Machine ndex. % ,8 TABLE X SUMMARY OF TEST RESULTS FOR MACHN December. 96 J J- J-2 J-3 J Current Machine Average Cumulative Machine Average Machine Factor, % Machine ndex,. % , , /2 /2 Kin. ' 4 * t ) Q

25 f -b 39 TABLE X SUMMARY OF TEST RESULTS FOR MACHNE K December, 96. Q ~ Code Made Recd. Mill Roll No. Basis Weight, lb. per sq. ft. Caliper, points Max. Min* Concora Flat Crush, pgs~io Av. Max, Mini. Av. Single-FAce FleLt Crush, pos.. Max. Min. Av. Runabi-lity, maxdimum Tension at 63 fop~m.,.ib./in. ~-j cl-i g,. P. K Current Machine Average Cunuative Machine Average M-achine Factor. % Machine ndex. % , * CO- C,. C4- TABLE XV SUMMARY OF TEST RESULTS FOR MACHNE L December, 96 L-l L , Man. /2 Current Machine Average Cumulative 'Machine Average Machine Factor, Of Machine ndex, % 26 * la CA (4&

26 -4 --w TAML XV -. SUMWAR OF TEST RESULTS FOR MACHNE M December, 96 H r Code Made Recd. Mill Roll No, Basis Weight, lb. per sq. ft. Caliper, points Mfaxa Min. Concora Flat Crush, pesoi. Ave Max* Min. AV. Single-Face FlaLt Crush, p.s.io Max. Min. Ave Runability, maximum Tension at 63 fop~m.,.lb./in. -~ -4 M- ' M4-4 M *7 26.* , Min. /2 Min. Min. Min. - 4) Current Machine Average C-uL-L2ative Machine Average Machine Factor,,, Machinne ndex, % , TARTE XV SUMMARY OF TEST RESULTS FOR MACHNE N December. 96 N- N * /2 /2 'Q.(D Ea Current Machine Average Cunr.ulative Machine.Average Machine Factor, % Machine ndex. % 26 * ;O e- 4 cl-(

27 U TABLE XV SUNM(ARY OF TEST RESULTS FOR MACHNE December, 96 Code Made Recd Mill Roll No, Basis Weight, lb. per sq. ft Caliper, points Max. Min Concora Flat Crush, pos.i. Av. Max, Min. Avo..9.* * * Single-Face Flat Crush, p*soi* Max. Min. AV *9 32. Runability, Maximium Tension at 63 f~pom., lb./in. /2 /2 Min. Min. - ~ -) C,.~- Cla,. C) Current Machine Average Cumulative Machine Average Machine Factor, % Machine ndex, % * TABLE XV SUMMARY OF TEST RESULTS FOR MACHNE P December, 96 P-i _P-2 P-3 P * , /2 /2 * 4 CD Ca Current Machine Average Cumulative Machine Average Machine Factor, % Machine ndex, % CD * OQ c 4 C s G)

28 SUMMARY OF TEST RESULTS FOR MACHNE Q December, 96 (D T. Code Made Recd. Mill Roll No, Basis Weight, lb. per sq. ft. Cal iper, points Max. Min. Concora. Flat Crush, pos~i* Ave Max.o Kin. AV, Single-Face Flat Crush, pesoie Max. Min. AV. Runability, Maxdimum Tension at 63 fopem.,.lb./in. Cs. 8 C co- Q-3 Q-2 Q-5 Q-6 Q-7 Q * *5 3 * * /2 /2 al -'. -4 Current machinee Average Cumulative Machine Average Machine Factor. % Machine ndex, % *4 96 * TABE XX R- R-2 R-3 R-4 R-5 R U Current Machine Average Cumulative Machine Average Machine Factor. % Machine ndex-, % SUMMARY OF TEST RESULTS FOR MAC~HNE R December, /2 /2 CD s CQ

29 A? TABLE XX SUMMARY OF TEST RESULTS FOR MACHNE S December, 96 * % CD CD. Code S.-i S-2 S-3 S-4 S-5 S-6 Made Recd Kill Roli No* Basis Weight, lb. per sq. ft Caliper, Concora Flat Crush, Single-Face Flat points poseie Crush, posoi. Max. Min. Avo Max. Min. Av. Max. Min. AV * Runabi~lity, Maximum Tension at 63 f~pem., lb./in. Min. 2/2 Note a Note a Min. -.3 ci- C4D D - Current Machine Average Cumulative Machine Average Machine Factor, % Machine ndex. % * * 33, TABLE XX SUMMARY OF TEST RESULTS FOR MACHNE T December, 96 T- T-2 T-3 T-4 T K-i K-2 K-3 K-4 K , /2 * * CD Ca Current Machine Average Cumulative Machine Average Machine Factor,' % Machine ndex,' % * O Ci- Co M N a maximum speed at which this roll could be corrugated with minimum tension was 575 f.p.m.

30 4 qw - w w TABLE XX SUM4ARY OF TEST RESULTS FOJR MA~CHNE U December, 96 *e 8j -3 C.ode Mrade Recd. U-- '-2-6 '-28-6 Mill Roll No. 7 Basis Weight, lb. per sq. fto 26. Caliper, points Max. Mini. Concora Flat Crush, Pa.S.. Avo Max. Mino. AV, Single-Face Fliit Crush, p*s~i. Max. Mini. Av. Note a Runability, Maximum Tenision at 63 f~poma, lb./in. Note a C+ C.-j '-4 + C,',,ren't- Ma'chine Average Cum.--oative l~achirne Average Machine- Factor.,"O M~acnilhe ndex-, 5' a Single-face flat crush could not be determined because the medium fractured at less than f.p.m. - s CQ C+ CD CD K)

31 - Fourdrinier Kraft Board nstitute 9 nco Page 26 Project 8-7 Progress Report 8 DSCUSSON OF CONCORA FLAT CRUSH TEST RESULTS OBTANED AT THE NSTTUTE OF PAPER CHEMSTRY AND THOSE OBTANED AT THE MLLS n.table XXV a comparison of nstitute and Mill Concora flat crush test results obtained on conditioned specimens is given for the month of December. These comparisons were initiated in Progress Report 3 and permit interested participants to submit their Concora flat crush test results to The nstitute of Paper Chemistry so that comparative results may be included in the monthly reports Data sheets for supplying this information may be obtained from the nstituteo Comparisons of this kind are a helpful adjunct to other calibration procedures t may be noted in Table XXV that fifteen of the twenty-one participating machines are included in this comparison of Concora flat crush data. Shown in Table XXV are the nstitute and mill Concora averages for each roll included in this comparison" the difference between the roll average based on nstitute data and that based on mill data, the nstitute and mill averages based on all rolls included in the comparison; and the difference between these over-all averages The Concora flat crush data shown in Table XXV are summarized in Part of Table XXV where for each machine the following information is given: () Current machine average based on nstitute data, (2) current machine average based on mill data, (3) the average difference-- that is, the difference between the current machine average based on nstitute data and that based on mill data and (4) the maximum difference encountered in comparing nstitute and mill test averages for individual rolls. n Part of Table XXV the average difference of Part has been

32 Machine A Mll Concora Flat Crush, p.s.i. Roll nsti- Differ- Code No. Made tute Mill ence a TABLE XXV NSTTUTE AND MLL CONCORA FLAT CRUSH TEST RESULTS ON NDVDUAL ROLLS FOR DECEMBER, 96 Machine D Mill Concora Flat Crush, p.s.i. Roll nsti- iffer- Code No. Made tute Mill ence a c z n Machine E 3 Mill Concora Flat Crush p.s.i. Roll nsti- Differ- Code No. Made tute Mill ence a A-l A A A Current Machine Av D D D D Current Machine Av E- E E E Current Machine Av *2.6 3n *. 3 H Machine F Machine G MachineH F F F F F G G G G G H H H H Current Machine Av Current Machine Av Current Machine Av Machine Machine J Machine L J- J-2 J-3 J L-l L Current Machine Av Current Machine Av Current Machine Av / 'U ra w -. -

33 A, TABLE XXV (Continued) NSTTUTE AND MLL CONCORA FLAT CRUSH TEST RESULTS ON NDVDUAL ROLLS FOR DECEMBLER, 96 CD P. - Machine M Mill ~~Concora. Flat Crush, P.s.i. Roll nsti- Differ- %Cide No. Made tute Mill ence Machine N Mill Concora Flat Crush. p.s.i. Roll nsti- Differ- Code No. Made tute Mill ence a Machine Mill Concora Flat Crush. P.s.i. Roll nsti- Differ- Code No. Made tute Mill encea H CD 9 -.~ -~ !:_ e N-l N N * N ~ Cent Machine Av Current Machine Av Current Machine Av C Machine P R- R-2 R-3 R-4 R-5 R a Machine R Machine S Current M.achine Av Current Machine Av Current Machine Av O S-2 S-3 S-4 S : * la CD (a.p

34 N to. Q - oo't ilq '4nse.x eti; RumCd-r;ET puw ~z~ amxw umqo= quaizinw oan;tqsu aliq X~q (aqu spq jo 4j~ UTr aoqe -~oils) *~s~d UT aouajaj;t~p a~ea.x&& aiq4 BuTpT.&Tp &q pa,4ndnoo ST (queo zed) aouaja;j~p a~uwaay p 'AXX etqul 99 *STlo.X T9npTAi.PU.iOJ Ge8eWeAu ;ca;- T-M pue 9e4n4;;SU 2UT~dM UT PeGzeUnOO~U eoug-zjjtp 994ea2 9t4 ST Gua-zeJ-TP =--- W j 'AM e~qi~j aag a*eueaxeje. O94 si pasu sq-ensai 4S- OW4TW~U Gq-, ~4TJ eqne~ qsaq TTm uo paesq 4vlfl pue -cnrce.x qsaqe; n- ~c uo pesvq 92BjaAv U Tr oein que.lmo etf uaem,49q azoueazejjtp 4S U.~jp~ 'PG94Tflqfl 8.9R 8DVP TflT totra JOJ 9ET-[- Qro4fl STUO OPnOUTr 82U.AU autoutom q4uazan~ u pareq sucs-aedm.oo M is~~~~~~~ - - 7*5+ rc+ - + Z9- T+ TT+ Ce4 - - O, +,O- LZ+ 5+ 5O Ce8+ TjL+ - 9T+ 5't+ 9'9+ CO+ LZ+ -- L8S+ Vr- O'Z+ 7'C+ 5'T+ 6'C TO+ ZZ - 5j+' LT- Z,+ Cl9+ T ,7+ 7,7+ *94+ 5+,+ ' ~L+ LS - - 8,7+ 7C+- - 6'9+ (.zoqoqzo) Wicdoa q,;jj (.8camGAo::) wodau tj-46l 3%.ezle.ajJTO ass.9ay 9JVOSAV H~fM3i VOl~ TM NO GaM~ JNHL OM VVG nuflsn NO GMW - LrA YHOD.ROD ZHa 2DUM (Jaho HU) 2N3,UO EMMY~A ZH, AO MHM hra HOOag NOflrMG v : ZH z C o - z S. C S+ 7*Z , +.* C 6*zC - - 8,6 9T - 2*"7+ 9't- Z'7+ - 9*Z+ 9- O'c+ - CLC 7,7C 9,6 - L7% o5 89c 6'C+ S*Z- - Cez+ gt C LU - Ce9c 5- - '7'Z `74. 6'5C 9'7 O'LE O' f 7*V + L `7+ zoe zo+ 9,Z+ 6aGC 8'L. 7'LC. L'S 9'LE 8-7C l7 z e 7 z a O `7 fl S 'a - Olz+ Gue.JT~ - +, q O.;ataUO 85'iaw - Ll7C lcttt3j)'ay~ OUmo ;'et-n - o`7f 8( 84ntVr~SU).Ay G t~dlrj ;,UB~o T s-d 'tqstui qwru U8joolco pa.rednoo Gc~cE ;c dl N w ' ~ r. H AJ a ( a v apco GUT.'povci VMLV TUNH NO CRM 39HJ. MVV VlVa SlUSN NO CGHSV SGVYlA HMfO.YA VHODNCO Z.t AC anhovi M HV OA ViMflS avhvdxjc V J.EVJ AXX FRV 2 CC L. Ca. U-

35 Fourdrinier Kraft Board nstitute, nc. Page 3 Project 8-7 Progress Report 8 converted to per cent by dividing it by the nstitute average and multiplying the result by o The average differences in per cent foi the current report and the two preceding reports are shown t may be seen that, for the current period, the highest average difference of 4.4% was associated with Machine and the lowest of.5% with Machines F and G. n the majority of comparisons, agreement between nstitute and mill data was good, as evidenced by the following comparison of nstitute and mill Concora flat crush results which shows the number of machines (and the cumulative percentage of all machines which this number represents) whose average Concora flat crush test results for the month of December fall within designated percentage ranges from the corresponding data obtained at the nstitutes Average Percentage Difference Between nstitute and Mill Concora Flat Number of Percentage of Crush Test Results a Machines All Machines +, 2 3o o 6 4o +.O 2 8 ± The average obtained at the nstitute was used as the reference in the calculation of the percentage differences.

36 7 Fourdrinier Kraft Board nstitute 9 Project 8-7 nco Page 3 Progress Report 8 THE NSTTUTE OF PAPER CHEMSTRY Wo N. Hubert, Research Aide Container Section R. Co McKee, Chief Container Section