摘要:
The invention relates to a process for producing polypropylene bottles comprising, forming a polypropylene preform by injection molding, cooling the polypropylene preform to ambient temperature, preheating the preform article, wherein the temperature around the circumference of the preform article has a temperature delta of less than 5 degrees Celsius at any height along the preform, inserting the preheated preform into a cavity of a stretch blow molding machine, and stretch blow molding the preform into a polypropylene bottle at a rate of at least 1000 bottles per cavity per hour, wherein the polypropylene bottle has a wall thickness delta at any given height along the bottle of less than 30% of the average wall thickness at the given height. The invention also relates to the polypropylene bottle made from this process.
摘要:
A process, system, and apparatus for effectively and economically producing fermentable sugars from cellulosic feedstocks is described. The economic viability of using wood and/or agricultural waste, containing large fractions of cellulose and hemicellulose is highly dependent on the method used for hydrolysis. Underlying the gist of this invention are newly discovered methods, means, and techniques by which both the pentosans and hexosans comprising the hemicellulose fraction of the selected feedstock and the hexosans comprising the cellulose fraction of the selected feedstock can be quickly and efficiently converted in a single pass through a single device to fermentable sugars containing minimal quantities of degradation products known to inhibit fermentation. Successful operation of this new hydrolysis process employing a new reactor design can produce fermentable sugars at rates and efficiencies previously thought unattainable by reducing the number of processing steps, pieces of equipment, and unit operation previously used.
摘要:
A system is designed to measure concrete rheological properties which includes a concrete plant, a measuring unit and a mix changing unit. The measuring unit includes a surface in contact with a part of a mass of the concrete mix, a shearing unit for effecting shear deformation in the mass and at least one sensor which senses a measure of the force which is transferred to the surface by the concrete mass as a result of the shear deformation. The rheological profile is produced by: a) sensing at least one measure of the force which is transferred to the surface under at least two different stress states, b) determining i) the sensitivity of each of the at least one measure to a change in stress state and ii) the workability of the mix and c) creating the rheological profile from at least the sensitivity and workability.
摘要:
A process for producing fibrous composite materials from feed stock formedreliminarily from a gypsum binder and chopped cellulose fibers, and saturating the mixture with water to the extent of at least 1.2 times its normal hydrated state, and beating the material to provide a fleece that is then spread on a flat surface and subjected to pressure for a sufficient length of time to drive out a substantial portion of the moisture from the product. The compression step is carried out long enough to achieve a bulk density of approximately 9/10 the dry bulk density of the components prior to hydration.
摘要:
A process and apparatus for the continuous production of a uniform layer ofoose material on a forming belt has a receiving belt onto which the loose product is deposited by a gravity chute in strips transverse to a travel direction of the receiving belt. A smoothing device above the receiving belt engages the strip layer over the entire length thereof on the receiving belt and smooths the material before it passes to a dispersing device directly or via said dispersion belt.
摘要:
Usage application of a per se known in the art continuous-operation machineor the recycling of gypsum plaster board. A coarsely pre-pulverized material is introduced into a continuous-operation machine and, within the continuous-operation machine, the waste material 20 is guided along a product-cycle in a spiral-shaped fashion through the container 4 The tools 18, 18', 18", 18'", which are arranged along an axial length on the shaft 7, rotate in a Froude number region Fr.gtoreq.7 and break-up the pre-pulverized waste material 20 to a sufficient extent that a grain spectrum is produced which effectively facilitates the use of calcination devices.
摘要:
Waste products which are to be disposed of by burial, are mixed with a hardening substance in bags which are wrapped around circular or approximately circular frames. The circular shape enables efficient mixing. The bagged frames are placed in a rectangular mould and the bags then filled and the contents mixed by stirring; the wrappings are released and the mixes settle into the shape of the rectangular interior of the mold and fill it, thus adopting the most efficient storage shape.
摘要:
A process for using shredded scrap or virgin fiber glass in combination with starch, water and other components to make ceiling tiles. The tiles are made by initially preparing a mixture of water, starch, boric acid and fire clay. That initial mixture is then heated to form a gel. Fiber glass is then added to the gel to form a pulp. The pulp is fed into trays to form slabs. The slabs are dried and finished into tiles.
摘要:
Acid resistant concrete articles, especially sulfur concrete pipes manufactured from a material formulated on the basis of a composition of portland cement concrete suitable for the manufacture of pipes by means of the dry casting method, the volume of portland cement, filler and water being replaced by a substantially equivalent volume of sulfur cement and filler, while the amount of other components remains substantially unchanged. The sulfur concrete pipes are manufactured by mixing the components of the material and adjusting the mixture to a temperature, where sulfur cement is liquid. At this temperature the mixture is cast while being subjected to vigorous vibration, using a casting mould preheated to a temperature of up to 160.degree. C. The cast pipes can be removed from the mould immediately after casting. After only 24 hours they have obtained sufficient strength for being delivered to a building site. Sulfur concrete pipes are most suitable in aggressive environments since they are resistant to acid and salt attacks.
摘要:
A method according to the invention involves continuously moving a mix within a closed vessel having loading and discharge pipes at the ends thereof. The mix is subjected to oscillations during movement by means of a source of oscillations. A gate is provided in the vessel upstream the discharge pipe for contolling the cross-sectional area of the flow path of the vessel and for defining a sealed zone in the vessel with the mix being processed. During movement, the mix is heated to 100.degree. C. and above by passing electric current therein by means of an electrode installed in the vessel. Vapor is thus formed which penetrates the whole body of the mix so as to carry out uniform and rapid heating of all components of the mix.