Document nkDx1MVVxqJpOQZXLyN0dwLJ8

STEEL HILL PRODUCTS DIVISION RESEARCH AND DEVELOPMENT DEPARTMENT AUGUST 1973 1. Kew Binder- used in Profax Recipes During the month, a critical shortage of Sit 177A resulted and we were ~ forced to find another binder to replace it. The replacement was considered to be at minimum 30%. The binder noted X3578 is a non-processed starch from American Maize and it is working only in combination with RM 177A. In two week's period we converted almost all Profax-: recipes being in production in Cleveland, Mt. Braddock and Chicago. So the former Profatf^5 31 recipe became EP-5452, EP-5297 became EP-5453, Profax^ 10 became EP-5459, EP-3999C became EP-5457, EP-3408A became EP-5458, EP-3900A became EP-5463, EP-3982D became EP-5462, and EP-390i became EP-5460. All these recipes were tried under the existent laboratory equipment and were acceptable. Under production procedure ail were acceptable except EP-S460. Also EP-5462 was not accepted due to shrinkage. Other starches which could be taken into consideration are produced by llubinger Company and A. . Staley Manufacturing. I::cr: i;:~ the possibility of using only X3578 as binder without any ?J1 177.-., our laboratory work showed that using around 20% ilexamethylcntetramine by weight of solid the transverse strength is acceptable. The usage of X3578 and Hcxamethylen tetramine is not feasible from this standpoint. 2. Fungicide usage for new Binder System in Profax^ Recipes The starch binder was considered less resistent in time ?han RM 177A. The tests showed that after three days of storage there is not any loss in strength or slurry characteristics. The present recipes using X357S do not incorporate the fungicide usage. The other starch binders do need fungicide as preservation component. 3. Shelf Life for Profax-* Material using X3578 One of the important problems of using X3578 Wes' envisioned to be the shelf life. Under lab conditions, we tried Profax" boards using EP-5452 recipe into a humid chamber. After six days tha boards lost 17% of their initial transverse strength which is comparable with the standard Profaa^9 31 boards. FOS-00-0000001 4<3>- 1652 4 Research and Development Department Monthly Report August 1973 Page 2 4. U.F. Liquid Resin In Profax-1 Dccause U.F. liquid resin is cheaper titan U.F. powder, we tried to replace U.F. powder in our recipes. The laboratory work showed good preliminary results. ^ The friability tests showed thac the usage of X3211* in place of Rl-1 447 at the same level is as good as the standard recipe. Ue have to schedule a production run. 5. Fireproofing Paper in Profax^ Many flame retardants and fireproofing compounds were tried but none were acceptable. We tried flame retardants and fireproofing compounds thinking thac the developed temperature during the paper carboration process is around 400-450*' so the RH 177A would not be Ignited. The lab work showed that there is no difference among the paper bearing materials with or withouc flame retardants and/or fire proofing compounds. 6. Other Binders Under our laboratory* conditions we cried successfully to use FVA liquid as a binder. So we found that in combination with RH 177A (1-1.57.) and RH 477 (powder or liquid) the results are acceptable. The used recipe was EP-5273D. v;e intend to try thac recipe in production. X3579 is cheaper chan X3578 and certainly cheaper chan RM 177A. 7. Drv Scrap Uammermilled Addition to Profax1* Material A 5^ dry scrap hammermilled addition co EP-5452 was cried under lab procedure cr.d was found satisfactory. Five production bacches were cried on Che 669 one-piece cops with no problems. We have co ask Che Production Department co use it under regular basis. 8. Non-Asbestos Profax^ Because of Che RM 177A crisis during the month, we did not spend consider able time improving one of the existent non-asbestos non-paper recipes or to come up with a new one. However, under lab conditions we found that an EP-5273 type recipe using a new type of surfactanc (cheaper chan X12S1) has better suspension properties and after 48 hours of settling it went back easily in suspension. The suspension properties are not destroyed after 20 minutes of vigorous pulping action. More work should be done in this respect and we have co schedule a production run co prove our lab work. 1653