37results about How to "Improve paper performance" patented technology

The present disclosure relates to an aramid paper for a honeycomb, which is prepared by mixing, with an aramid floc, an aramid pulp having a fiber length equal to or longer than a predetermined length and a fibril development equal to or higher than a predetermined level, at a predetermined ratio, a wholly aromatic aramid paper for an electrical insulation paper having superior paper formation property and thus having uniform electrical insulation property, which is prepared by mixing an aramid pulp having a fines content equal to or higher than a predetermined ratio at a predetermined ratio, a laminated aramid paper having a uniform thermal expansion coefficient, uniform electrical conductivity and uniform thermal conductivity, which is prepared by laminating an aramid paper with superior paper formation property on an aramid paper with superior paper strength by calendering, and a method for preparing the same. The aramid paper according to the present disclosure is applicable to a material or a component which requires precision with little difference in physical properties such as a thermal expansion coefficient, electrical conductivity and thermal conductivity. Specifically, it is applicable to a honeycomb, an electrical insulation paper, a PCB substrate, etc. because it has superior paper strength and paper formation property. Moreover, the method for preparing an aramid paper can solve the problems of poor transfer of a base paper, nonuniformity of strength and aggregation between flocs.

The invention discloses a preparation method of tobacco sheet paper base made from tobacco stems. Tobacco stems are used as raw materials to prepare paper, including the steps of dipping, refining, beating, and sheeting; the invention changes the traditional technical prejudice and habit of controlling the refining by controlling the current of the refiner, and creatively adopts the control of grinding The pulp grinding disc, the refining gap, the number of refining stages and the refining concentration are realized. The invention systematically optimizes the refining process conditions, adopts two-stage or three-stage refining, the refining concentration is 20%, and the refining gaps of the first stage and the second stage are respectively 0.4mm and 0.20mm. The present invention analyzes the relationship between the refining process and the performance of tobacco stem fibers through overall research, and summarizes the optimal controllable refining conditions, which ensures that the prepared tobacco stem pulp has the longest fiber length and the highest bulk thickness of the paper. The good quality of the reconstituted tobacco leaves is guaranteed, the performance of the paper base of the tobacco sheet is comprehensively improved, and finally a technical basis is provided for improving the quality of the tobacco sheet and the quality of the cigarette.

The invention relates to poly(ether ether ketone) fiber composite paper and a preparation method thereof, and belongs to the technical field of composite paper. The technical problems of poor paper forming property and low paper performance of poly(ether ether ketone) fiber paper in the prior art are solved. The preparation method includes the following steps that first, a poly(ether ether ketone)chopped fiber and aramid pulp are dispersed in a solution containing a dispersant to obtain fiber slurry, then the fiber slurry is evenly settled to form dense poly(ether ether ketone) fiber originalpaper through vacuum filtration, poly(ether ether ketone) dioxo-ketone is impregnated, primary poly(ether ether ketone) fiber composite paper is prepared by one-time hot pressing, and finally the poly(ether ether ketone) fiber composite paper is obtained by acidification, hydrolyzation, and secondary hot pressing. The poly(ether ether ketone) fiber composite paper prepared by the method has goodcompactness, mechanical strength, heat resistance performance and voltage resistance strength, and can be used in the fields of high temperature protection, electrical insulation and honeycomb structures.

The invention provides a synthetic fiber paper, which contains the following ingredients in parts of weight: 5-95 parts of structural fiber and 5-95 parts of splicing fibers, wherein, the structural fiber is polyisophthaloyl metaphenylene diamide fiber and the splicing fiber is polysulfonamide precipitated fiber. The synthetic fiber paper is produced by the following steps: the structural fiber and the splicing fiber are made into be formed by a wet method and hot-rolled to obtain the paper. The synthetic fiber paper provided by the invention has high intensity conservation rate under the high temperature, excellent paper-making overall properties compared with the insulation paper made of full para-fiber, meta-fiber and full polysulfonamide material, and is more suitable for the insulation requirement under high-temperature environment.

The invention relates to an atlas mounting process. The process of the invention can continuously present single-page handwritten notes, letters, rubbings or documents to prevent scattering and loss, and at the same time has the functions of protection and visual beautification. firm. The invention adopts the double-layer continuous design of the carrying backing paper, has high strength and high paper performance, and the document is adhered to the art paper, which is suitable for long-term use and preservation. In addition, the length of the carrying backing paper is continuous to the entire album, the damage resistance of the inner core of the entire album is improved, and the durability of stretching and folding is several times higher than that of conventional albums.

The invention discloses a production method of corrugated medium paper with improved deinking efficiency, which comprises a soaking activation step, a hydraulic pulping step, a screening and slag removal step, a rubbing centrifugal deinking step, a bleaching step, a washing and concentrating step and a pulp storage step. Use a neutral deinking agent to directly rub the waste paper fibers for centrifugal deinking, and separate the ink through the process cooperation between activated ink and centrifugal deinking, which reduces the amount of alkaline deinking agent used and further reduces waste paper making The production cost is reduced, the deinking efficiency and ink removal rate are improved, the whiteness is improved, and the pollution to the environment is reduced.

The invention discloses a method of a graphene / carbon nanotube composite material. The method comprises the following steps: treating graphite serving as a raw material with a strong oxidant expansion separation method to obtain graphene oxide; adding carbon nanotubes; dispersing the carbon tubes in an oxidizing way; and performing the treatment of separation, washing, reduction and the like to obtain the graphene / carbon nanotube composite material, wherein the carbon nanotubes are single-wall carbon nanotubes, double-wall carbon nanotubes and multi-wall carbon nanotubes. The method has the advantages that graphene preparation is combined with a carbon tube compounding process, and a strong oxidant left in the preparation of graphene is used for dispersing the carbon nanotubes in an oxidizing way, so that the compounding cost can be reduced, and the efficiency is increased. In particular for carbon nanotubes gathered into bundles, the strong oxidant left in the preparation of graphene can be used for performing oxidation intercalation among the tube walls of carbon tube bundles to disperse the carbon tubes, so that uniform compounding of the carbon tubes with graphene is realized.

The invention discloses a double-warp flat wire drying net and a method for manufacturing the double-warp flat wire drying net. The double-warp flat wire drying net includes a machine layer and a paper-forming layer arranged on the machine layer; the paper-forming layer consists of The first warp thread and the first weft thread are interwoven; the machine layer is formed by the second warp thread and the second weft thread interweaving, and the minimum organizational unit is composed of 4 polyester monofilaments as warp threads and 6 polyester monofilaments as weft threads. The present invention increases the contact area with the paper by using the first warp and the second warp, so that the paper has a good paper-making effect, no screen printing, minimal longitudinal extension, and long service life; the first weft and the second weft are used , one of which has a rectangular cross-section, which reduces the stagger between the upper and lower layers of the drying wire, has no internal wear, and improves wear resistance. At the same time, it runs under the maximum tension of the paper machine without stretching and retracting, and the stability is improved. Reinforced for longer service life.

An embodiment of the present invention provides a bamboo pulp household papermaking method, comprising: making bamboo pulp as the main pulp, and distributing the pulp into A pulp and B pulp, and separately separating A pulp and B pulp, and mixing The separated pulp forms the first mixed pulp and the second mixed pulp, and after the second mixed pulp is refined, the first mixed pulp and the refined second mixed pulp are used to make paper in the paper machine, The paper machine described is a crescent-shaped paper machine. By distributing the slurry and then classifying, the distribution and proportion of fibers of different lengths in the bamboo pulp can be adjusted. On the one hand, it can save energy and improve the softener and wet strength. On the other hand, after adjusting the distribution and proportion of fibers of different lengths in the bamboo pulp, the pulp has better forming performance, which meets the needs of the crescent-shaped paper machine and improves the paper-forming performance of the paper. Provided is a household paper produced by using the above bamboo pulp household paper production method.