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231 results about "Paper recycling" patented technology

The recycling of paper is the process by which waste paper is turned into new paper products. It has a number of important benefits: It saves waste paper from occupying landfill and producing methane as it breaks down. Because paper fibre contains carbon (originally absorbed by the tree from which is was produced), recycling keeps the carbon locked up for longer and out of the atmosphere. Around two thirds of all paper products in the US are now recovered and recycled, although it does not all become new paper. After repeated processing the fibres become too short for the production of new paper - this is why virgin fibre (from sustainably farmed trees) will be added to the pulp recipe.

Waterproof and oilproof agent as well as preparation method and application thereof

The invention relates to a waterproof and oilproof agent as well as a preparation method and application thereof. The waterproof and oilproof agent is prepared from the following components in percentage by weight: 30%-50% of styrene acrylic polymer, 5%-10% of beeswax emulsion, 2.5%-4.5% of polyvinyl alcohol, 2%-5.5% of modified starch, 0.5%-2% of plasticizer and 28%-60% of deionized water. The waterproof and oilproof agent is good in film-forming property; beeswax emulsion in a formed coating and the styrene-acrylic acid polymer are combined to form a hydrophobic and oleophobic surface layer;meanwhile, the hydrophobic and oleophobic surface layer is compounded with the modified starch, so that the waterproof and oilproof effects of the waterproof and oilproof coating on food-grade raw paper are obviously improved; the waterproof and oilproof properties of the waterproof and oilproof agent are extremely good; the waterproof and oilproof agent can completely replace traditional waxing,silicon coating and laminating processes; and the paper can directly enter a papermaking pulping system to be recycled when being recycled, the pollution of the laminated paper to the environment isreduced; and therefore, the waterproof and oilproof agent is an environment-friendly material.
Owner:ZHONGSHAN TIAN JIA PAPER PROD

Handheld fiber wire laying device

The invention relates to a handheld fiber laying device. The device comprises a mechanical arm and a laying head, wherein the mechanical arm is fixed on the ground or on a trolley, and the laying head is fixed at the front end of the mechanical arm; the mechanical arm comprises a fixed column, a rotating column, a control box, a swinging arm, a main arm, a small arm, a suspension arm, a cylinder and a pneumatic balance system; and the laying head comprises a wire guiding module, a re-delivering module, a cutting module, a pressure head module, a lining paper recycling module and a heating module. The mechanical arm disclosed by the invention enables a worker to push the workpiece and complete the laying work by using a very weak force, and the mechanical arm can automatically maintain a state of equilibrium in any position and any condition; the laying head disclosed by the invention can laying a plurality of narrow fiber prepreg tapes at one time and can complete the functions of wire guiding, conveying, lining paper recycling, shearing, heating and laying, and the laying head is not only suitable for a mandrel with a simple structure of a cylinder, but also is suitable for a mandrel with a special structure of a cone or a latticed shape. The handheld fiber laying device has the advantages of simplicity in operation, less manpower, high efficiency, and good laying effect.
Owner:WUHAN UNIV OF TECH

Bonding process of solar condenser lens assembly

The invention discloses a bonding process of a solar condenser lens assembly. The bonding process comprises the following steps of enabling one ends of pressure-sensitive adhesive films to align with one ends of lenses, and bonding the painting surfaces of the lenses to the lower surfaces of the pressure-sensitive adhesive films; rotating a pressure-sensitive adhesive tape roller, utilizing an elastic push roller to push the pressure-sensitive adhesive films to the other ends of the lenses, and enabling a release paper recycling roller to drive release paper on the lower surfaces of the pressure-sensitive adhesive films to rotate; cutting and separating the pressure-sensitive adhesive films matched with the lenses according to the dimensions of cut lenses; respectively enabling a plurality of glass surfaces of the cut lenses to be adsorbed and flatly attached onto an adsorption surface of a convex die; removing the release paper on the upper surfaces of the pressure-sensitive adhesive films, and attaching the convex die adsorbing the plurality of cut lenses onto a back plate, wherein two ends of the convex die align with two ends of the back plate; and taking off the convex die, and utilizing the elastic push roller to gradually push the glass surfaces of the lenses to enable the upper surfaces of the pressure-sensitive adhesive films to completely contact with the bonding surface of the back plate. By means of the bonding process of the solar condenser lens assembly, the bonding effect is good, and the bonding performance is stable. Furthermore, the bonding process can be widely applied to the field of production of the solar condenser lens assembly.
Owner:DALIAN GREAT OCEAN NEW ENERGY DEV

Paper machine system and negative ion control method thereof

The invention provides a negative ion control method of a paper machine system. The method comprises the step of adding a polymer of low molecular weight and high charge density into at least one of a mechanical pulp line, an off-machine coating (OMC) broken-paper recycling line and a paper machine wastewater circulation line of the paper machine system, so as to neutralize negative ions in a sizing agent. Through the paper machine system and the negative ion control method thereof, in the running process of a paper machine, the content of negative ions in the sizing agent is controlled in three points such as the mechanical pulp line (BC pulp line), the OMC broken-paper recycling line and the paper machine wastewater circulation line, so that the problem that the negative ion content is too high is solved in two manners of reducing the number of negative ions entering the system and treating the negative ions entering the system, not only can the content of negative ion garbage in a wastewater system of the paper machine be reduced effectively, and but also the requirement of positive ions is reduced. Moreover, cleaning of a wet part system can improve the stability of the wet part directly; furthermore, the running performance of the paper machine and the use efficiency of chemicals are improved, and the output of broken holes and broken paper in the running process of the paper machine is reduced.
Owner:GOLD EAST PAPER JIANGSU
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