papr12 - 1 Preparation of Papermaking Stock- Refining PAPR...

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Unformatted text preview: 1 Preparation of Papermaking Stock- Refining PAPR 1000 Introduction to Pulp and Paper Manufacture 2 Papermaking Technology Papermaking Technology Pulping Fibers liberated from wood matrix Papermaking Fibers formed into sheets and bonded together 3 Stock Preparation Stock Preparation The conversion of a raw pulp slurry (bleached or unbleached) into papermaking stock The basic objectives in stock preparation are to take the required pulps (wood or non-wood) and additives, treat and modify each furnish constituent as required, and then combine all the ingredients continuously and uniformly into the papermaking stock 4 Stock Preparation- Functions The primary function of stock preparation is to produce a uniform papermaking furnish modify / improve / add new properties to the paper enhance paper machine runnability reduce the paper production cost reduce the total material cost 5 Stock Preparation- Operations The following operations are usually involved: Re-pulping Beating / Refining Additives Metering and Blending Cleaning and Screening 6 Raw Papermaking Fibers As liberated during pulping, the fibers are still...
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papr12 - 1 Preparation of Papermaking Stock- Refining PAPR...

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