Forest Sciences Commons^™

A Study Of The Water Retention Of Latex Bound Pigmented Coating Colors, Patrick T. Gibney

Paper Engineering Senior Theses

The purpose of this study was to examine the effects of three types of commercially used hydrocolloid; CMC 7M, CMC 7L, HEC 250M and KELGIN MV on water retention and on coated paper properties. It was found that the concentration of hydrocolloid was an important factor in water retention values. Carboxyl groups were theorized to be another factor in water retention. Hydrocolloids were found to lower opacity, brightness and gloss over the blank coating. Increasing hydrocolloid levels decreased the openness of the coating. When increasing the amount of hydrocolloid the IGT pick decreased. KELGIN MV gave the highest water retention …

The Effect Of Secondary Fiber Furnish On The Tensile Energy Absorption Capacity Of Paper Under Repeated Extension Cycles, James Patton

Paper Engineering Senior Theses

The object of this study was to determine what effect does recycling paper have on the tensile energy absorption (TEA) of that paper. The TEA of the sheet was split into two components, the elastic and the plastic. The sum of the two components gives the composite TEA.

The TEA's were measured at three different numbers of extension-cycles. It was found that a greater number of extension cycles resulted in greater TEA's for both elastic and plastic regions.

It was discovered that elastic TEA does not decrease with the first or second degree of recycling. Plastic TEA suffers its greatest …

The Kenics Static Mixer As A Consistency Sensor, Bruce P. Marling

Paper Engineering Senior Theses

Ever since the inception of paper machines in the industry, the problem of consistency has troubled production efforts. Present sensors are sensitive to flow rate, temperature, additives and freeness as well as consistency. In spite of claims made by various manufacturers, there is still not an instrument on the market guaranteed to maintain calibration for identical uses from mill to mill. From the open type to closed type, sampling or continuous measurement type, each has its problems. A Kenics Static Mixer was evaluated in the Western Michigan University pilot plant for possible use as a consistency sensor. Research on the …

Measuring The Water Retention Of Coating Colors, Randy Musgrave

Paper Engineering Senior Theses

The water holding properties of coating colors are important for both finished sheet properties and proper runnability on the coater. A test cell was constructed which is capable of measuring water retention of coating slips and predicting water hold out of base papers. The study showed that enzyme conversion time of starch was inversely related to viscosity and water retention. Also the level of sizing was determined to have the greatest influence on water hold out of base stocks.

Temperature Dependence Of The Retention Of Organic Fines Using A Cationic Retention Aid, Danny R. Mcrae

Paper Engineering Senior Theses

Stock of 50:50 bleached Kraft softwood and hardwood run through the Valley beater at 350 CSF with high fines content (25-30% fines from softwood and hardwood fractions run through a Wiley mill) was prepared and tested for fines fractionation, fines retention, and system surface charge at 10, 25, 40, and 55°C using a Dow Chemical cationic polymer of 1,000,000 molecular weight: SEPARAN CP-7. The Britt Dynamic Drainage Jar was used for fines fractionation and retention data and Halabisky's Colloid Titration Technique for surface charge data. Cationic polymer loadings were taken at 0.25, 0.50, and 0.75 pounds of polymer per ton …

How Lignin, Hemicellulose, And Cellulose Affect The Properties Of Oxygen Versus Kraft Pulps, Jeff C. Pobanz

Paper Engineering Senior Theses

A batch of chips was subjected to an oxygen pulping and a kraft pulping system. The resulting pulp was tested in its unbleached condition. It was then bleached, tested again. Handsheets were tested using the Pulmac zero span tensile tester and other standard physical tests. The pulps were tested using the Pulmac permeability tester. This procedure gave the opportunity to look at how the differences between the individual fibers and their components affect the differences in the strength between oxygen and kraft pulp handsheets.

The oxygen pulp was severely degraded than was the kraft pulp. This led to shorter, weaker …

The Effects Of Deinking Offset Printed Newsprint With Acetone And Perchloroethylene, Steven D. Schultz

Paper Engineering Senior Theses

The possibility of deinking newsprint with organic solvents, acetone and perchlorethylene, were examined by varying solvent mixtures, temperature of extractions, number of extractions, and consistency of extractions. Promising results were obtained in finding optimum conditions for the variables above. Yields obtained were over 94%. Solvents were recovered by distillation.

The Effects Of Molecular Weight Of Cationic Retention Aids And Turbulence On The Retention Of Organic Fines, Dirk Swinehart

Paper Engineering Senior Theses

The retention of organic fines is of major importance to the paper industry. Fines have been found to increase Mullen and tensile strengths. Increased retention, though my adversely affect drainage. Fines also adversely affect the environment when not retained in the sheet. They increase the turbidity of receiving waters and otherwise affect the bottom fauna because of settling. In receiving waters, they are a BOD problem as well as a source of color.

The dynamic drainage jar was used to test the retention of fines involving only colloidal forces. Three degrees of turbulence were used, 500 rpm, 1000 rpm, and …

Surfactants As An Aid In The Kraft Pulping Of Hardwood, Bradley A. Veld

Paper Engineering Senior Theses

Surfactants were used in the pulping of Kraft hardwood chips in an attempt to decrease cooking time while attaining ·the same Kappa Number. It was found that surfactants could not be used to decrease cooking time, but anthraquinone and nonylphenol could be used to increase both yield and bond strength.Dimethylamides and quaternary ammonium salt surfactants were found to be detrimental to the pulping of hardwood resulting in hard uncooked chips

An Evaluation Of The Asphalt Dispersion Units Effects At The Mead Corporation’S Otsego Paperboard Mill, Mark O. Harrison

Paper Engineering Senior Theses

An evaluation is presented as to the process effects of the asphalt dispersion unit at the Mead Corporation's Otsego Paperboard Mill. The parameters investigated were: steam consumption, refining load, production rate, temperature of process, machine cleanliness and sheet properties such as appearance, caliper, moisture, stiffness, and mullen plybonds. The procedures used are presented and the results are included as daily averages in tables and graphs. The asphalt dispersion units effects were determined by comparison of data taken when the unit was operating as opposed to when the unit was shutdown and by passed.

It was found that there was a …

The Techniques Of Thin Layer Chromatography And The Study Of Carbohydrates Using Thin Layer Chromatography, Dennis J. Hippchen

Paper Engineering Senior Theses

Refined Kraft pulp is found to contain D (+), Mannose, D (+) Xylose, and Glucose; and not to contain Galactose. Silia gel plates and Kieselguhr plates were used for the separation. Sodium hydroxide was the carrier solvent and the plates conditioned for thirty minutes.

The Kamag Vario-KS-Chamber is found to be a good effective laboratory tool. There are many areas where this technique can be used.

A detailed historical background is given for a basic background in thin layer chromatography, along with a complete experimental procedure of the use of the Vario-KS-Chamber.