SB 086.1 | Paper Machinery Corporation

Service Bulletin: SB 086.1

Subject: Temperature of Paper Roll Stock Prior to Forming

Recommendations:

Whenever it is necessary to bring “cold” rolls of paper directly to the cup forming area this can cause a detrimental effect on the paper by allowing moisture in the form of condensation to form on the paper. Avoiding this problem requires conditioning the roll before removing the outer wrapping from the roll.

To normalize the temperature of the paper roll to the converting area temperature:

1. Keep the wrapping on the roll

2.Use temperature conditioning chart below for common roll sizes to determine time in hours required for paper to reach converting area temperature.

Temperature DIFFERENCE in &Mac251;F/&Mac251;C between paper as removed from the storage area (outdoor or warehouse temperature may be used) and the ambient temperature in the converting area.

Cubic Feet	Roll Size	Dia	F°C°	10-12	15-9	20-6	25-4
4.9	30″	76cm		5 hr	9hr	12 hr	15 hr
8.5	40″	100cm		7 hr	11 hr	15 hr	18 hr
12.2	48″	122cm		8 hr	14 hr	18 hr	22 hr
19.0	60″	152cm		10 hr	15 hr	17 hr	25 hr

Cubic Feet	Roll Size	Dia	F°C°	30-1	404	5010	6015
4.9	30″	76cm		18 hr	25 hr	35 hr	30 hr
8.5	40″	100cm		22 hr	29 hr	43 hr	42 hr
12.2	48″	122cm		27 hr	38 hr	51 hr	50 hr
19.0	60″	152cm		31 hr	43 hr	59 hr	60 hr

3. Remove wrapping just prior to putting the paper into the cup machine

Note: To determine cubic feet for any specific roll size square the roll diameter in inches, multiply by .785 and then by the roll width in inches, then divide by 1728.

Cubic feet of roll=[(Roll Dia. in inches)2x .785 x Roll width in inches]/1728
Cubic feet x 0/02832=Cubic Meters

Source:Graphic Arts Technical Foundation “Handbook for Graphic Communications”
Volume: ink, paper, binding – page 50

Temperature of Paper Roll Stock Prior to Forming SB 086.1