84results about How to "Increased fiber length" patented technology

A headend transmitter that transmits 1024 QAM including a 256 QAM modulator which has been modified to have more aggressive forward error correction processing. The 256 QAM modulator outputs 256 QAM points to a summer. Another data modulator receives additional data to be transmitted in a separate, substantially less complex constellation. This modulator processes the additional data to do forward error correction thereon and then maps the encoded data into a less complex constellation such as QPSK, 16 QAM etc. The additional data constellation points are then amplified in a variable gain amplifier and fed to a summer where each additional data point is added by vector summation to one 256 QAM point. The output 1024 QAM point is filtered and shifted to the desired transmission frequency. Legacy cable modem receivers can still receive the 256 QAM point since the addition of the new data just appears to be noise which they can overcome using the parity bits encoded in the transmitted symbols. 1024 QAM cable modem receivers receive both the 256 QAM points and the new data points and output both.

A process for making fibrillated fibers includes preparing a fluid suspension of fibers, low shear refining the fibers at a first shear rate to create fibrillated fibers having a reduced CSF, and subsequently higher shear refining the fibers at a second shear rate, higher than the first shear rate, to increase the degree of fibrillation of the fibers. The refining at the first shear rate may be with a rotor at a first maximum shear rate and the refining at the second shear rate may be with a rotor at a second maximum shear rate, higher than the first maximum shear rate. The process may further include pre-treating the fibers by high shear refining with impact to stress the fibers prior to low shear refining.

The invention discloses a method for preparing reconstituted tobacco paper base made from tobacco stems, wherein the reconstituted tobacco paper base is prepared through taking the tobacco stems as a raw material and adopting a papermaking method and the preparing method comprises the steps of impregnation, defibrination, pulping, sheet making and drying of the tobacco stems. According to the invention, a technical scheme capable of optimizing the comprehensive property of the reconstituted tobacco paper base made from the tobacco stems is provided, which comprises treatment conditions of key processes of the impregnation, the defibrination, the pulping and the like; and a technical mean capable of improving the fiber morphology of the tobacco stems and the physical property of paper pulp is obtained. Showed by results, contents of water-soluble sugar, total plant alkaloid, chlorine and total nitrogen in the tobacco stems are decreased to varying degrees and the holocellulose content is relatively increased by 12.4% after the impregnation and extraction in the technical scheme provided by the invention are adopted; the fiber length of the obtained tobacco stem pulp is longest and the bulk of the finished paper is highest through selecting different types of refining plates and different defibrination gaps; and the tensile index, the tear index, the bulk, the air permeability and the burst index of a paper base product are appropriate and the good quality of reconstituted tobacco is guaranteed through combining the design of the beating degree of the tobacco stem pulp and the technical condition of the sheet making.

The invention discloses a method for preparing tobacco sheet paper base from tobacco stems as raw materials by adopting the paper making process. The method comprises the following steps: impregnating, pulping and making sheets. The invention changes the traditional technological prejudice and custom of controlling the pulping by controlling the current of a pulping machine and innovatively realizes the pulping by controlling the pulping disc, the pulping gaps, the pulping segments and the pulping concentration. The condition of the pulping process is optimized systematically, two or three segments of pulping are adopted, the pulping concentration is controlled at 20%, and the pulping gaps for the first and second segments of pulping are respectively 0.4mm and 0.20mm. Through studying and analyzing the relation between the pulping process and the performance of the tobacco stem fiber integrally, the controllable optimum pulping condition is summarized, the longest fiber of the tobacco stem pulp, the highest bulk of the formed paper and the good quality of the reconstituted tobacco are guaranteed, the performance of the tobacco sheet paper base is improved comprehensively, and finally the technological basis is provided for improving the quality of the tobacco sheets and the cigarettes.

The gasket material that is manufactured from a joint seat which includes three layers, that is, a front surface layer (1a), a back surface layer (1b) and the middle layer (1c), and these layers have different composition of reinforced fiber and filler respectively, and this joint seat is made from an ingredient made by mixing and kneading rubber, reinforced fiber and filler, then pressurized laminating and vulcanizing the ingredient, this joint seat is characterized in that the reinforced fiber is as a sort of fibril which is composed from one or both of organic fiber and non-asbestos type inorganic fiber, and at least a part of the filler is spicular inorganic fiber and its composition is 10 wt %-45 wt %. According to this joint seat (1), a crack breakage of the gasket that the ingredient material is the joint seat (1) due to fretting is prevented.

In the method of generating high power light with high efficiency and low thermal loading, the improvement comprising the steps of resonantly pumping a first thulium-doped fiber laser with a second thulium-doped fiber last, said second thulium-doped fiber laser having a shorter wavelength than said first thulium-doped fiber laser.

The invention discloses a production technology of kraft vermicelli case board paper. The production technology comprises the steps that recycled waste paper materials are screened, the recycled waste paper with low ash content is selected for pulping with softwood pulp, preliminary pulping is conducted through the processes of repulping, purifying, screening and the like, the fiber strength is emphatically improving in the grading and beating processes, longer fibers are screened to serve as surface layer pulp, the fiber beating degree is improved on the condition that the fiber strength is not damaged, and the fiber bonding strength is improved through the fiber arrangement mode on a net portion so as to improve the surface strength, toughness and folding strength of finished paper; by means of the measures of surface sizing, after-drying moisture precise control and finished paper coating, the product has the better explosion-proof line quality advantage and is more environmentally friendly, and the market share of the product is bound to be increased.

An optical gain-fiber of a fiber-laser or a fiber-amplifier is optically pumped by radiation from a plurality of external cavity, optically pumped, surface-emitting semiconductor lasers (OPS-lasers). In one example, radiation from the OPS-lasers is focused by a lens into cladding of the gain-fiber at one end of the fiber. In another example radiation from the diode-lasers is focused into the core of a delivery fiber at one end of the delivery fiber. The other end of the delivery fiber is coupled to the cladding of the gain-fiber.

The invention relates to a high strength impregnation textured paper production process including the parts of paper making and impregnation processing, paper making part comprises wood pulp defibering, grinding, pulp mixing, purification, screening, forming on a net, squeezing and wrinkling, drying, coiling and cutting, the pulp mixing is as follows: ground pulp is added with a softening agent, a wet strength agent and cationic starch, the softening agent dosage is 3-8kg / T pulp, the wet strength agent dosage is 30-45kg / T pulp; the addition of the wet strength agent and the cationic starch comprises the steps of: the wet strength agent to be added into the paper making pulp is divided into two parts of a first wet strength agent and a second wet strength agent; the first wet strength agent and the cationic starch to be added into the paper making pulp are mixed evenly to obtain a mixture; the mixture is added into the paper making pulp and mixed evenly; the paper making pulp added with the evenly mixed mixture is added with the second wet strength agent, and is evenly mixed.

The invention discloses natural-color fuzzy bamboo pulp with high bacteriostatic activity. The natural-color fuzzy bamboo pulp is 25-30%ISO (International Standardization Organization) in whiteness degree, is 0.25-0.35kPa m<2>/g in bursting strength, is 17-21cm<3>/g in dry filling power, is 6-6.5s in water absorption time, is 8.9-9.8g/g in water absorption capacity, is 0.86-3.79mm in average fiber length and is 0.009-0.022mm in average fiber width. A preparation method of the natural-color fuzzy bamboo pulp comprises the steps of pulping raw materials, cooking, washing, modifying and drying, wherein the washing step comprises coarse selection by a vibrating screen, black liquid extraction by a vacuum pulp washer, fine selection by a pressure screen, dedusting by a residue removal and pulp washing by a vacuum pulp washing machine. The natural-color fuzzy bamboo pulp has long fiber length, high flexibility and good water-absorbing ability and water-retaining property, has soft and fluffy texture and strong antibacterial property, can keep the 100% natural color of the bamboo fiber and can remarkably improve the quality of the down-stream products; and the preparation method has the characteristics of simplicity in operation, convenience in production, low cost and environment protection.

The invention relates to the technical field of quality breeding of cotton fibers and specifically relates to a GhJMJ12 gene SNP marker related to cotton fiber quality and application of the same. TheGhJMJ12 gene SNP marker related to cotton fiber quality is located at the 7215bp locus of a GhJMJ12 gene of a Dt09 chromosome of cotton, the SNP marker is a base A or C, and the GhJMJ12 gene has a nucleotide sequence shown by SEQ ID NO:1. According to the invention, 10660 SNP markers are used for whole genome association study of quality characters of the cotton fibers, and the study indicates one SNP locus on the GhJMJ12 is significantly correlated with fiber quality characters such as the fiber length, the fiber specific strength, the fiber elongation and the fiber uniformity.

In a molding machine (130), exemplified in FIG. 4, lateral and angled offsetting of a twin screw extruder (26) from a shooting pot assembly (24) permits shortening of a transfer channel (56). To additionally reduce shear effects arising from melt residence time a nozzle adaptor (52), the transfer channel (56) is located within a hollow cone (102) of a platen (90), the hollow cone (102) typically formed by an arch-shaped intermediate support structure (154) coupling together front (150) and rear (152) walls of the platen (90). To address bulk material removal brought about by the introduction of a barrel head, transfer channel (56) and extruder barrel tip within the hollow cone (102), reinforcement of an upper region of the rear wall (152) of the platen (90) is accomplished using a cross-member (160, 164). In an in-line compounding application, decreased lengths for the transfer channel (56) and nozzle adaptor (52) both reduce shear effects on the melt (by decreasing melt residence time) and thus an increased average fibre length in a molded part is achieved.

The invention provides a news printing paper. Pulp materials of the news printing paper comprise 20-100 percent of unbleached straw pulp and 80-0 percent of wood pulp, the definite quantity is 42-51g/m2, the opacity is more than or equal to 88 percent, the fracture length is more than or equal to 3.5km, and the whiteness is 35-75 percent of ISO. The production of the news printing paper not only can save the energy and cost, but also can significantly reduce the emission of pollutants.

Stimulated Brillouin scattering (SBS) limits the maximum power in fiber lasers with narrow linewidths. SBS occurs when the power exceeds a threshold proportional to the beam area divided by the effective fiber length. The fiber lasers disclosed here operate with higher SBS power thresholds (and hence higher maximum powers at kilohertz-class linewidths) than other fiber lasers thanks to several techniques. These techniques include using high-absorption gain fibers, operating the laser with low pump absorption (e.g., ≤80%), reducing the length of un-pumped gain fiber at the fiber output, foregoing a delivery fiber at the output, foregoing a cladding light stripper at the output, using free-space dichroic mirrors to separate signal light from unabsorbed pump light, and using cascaded gain fibers with non-overlapping Stokes shifts. The upstream gain fiber has high absorption and a larger diameter for high gain, and subsequent gain fiber has a smaller diameter to improve beam quality.

The invention relates to a method for improving quality of cotton fibers by overexpressing GhCAD6 gene, belonging to the technical field of biology. The method comprises the following steps: constructing a plant overexpression vector pCAMINBIA-2300-GhCAD6 from styrone dehydrogenase gene GhCAD6 in cotton fibers, transforming the vector into agrobacterium LB4404 by agrobacterium mediation, and integrating into cotton to obtain the trans-styrone dehydrogenase gene cotton plant. The field and molecular detection analysis detects that the lignin content in cotton fibers obviously increases in different development periods, the fibrocyte wall thickness obviously decreases in the cotton secondary wall rapid deposition stage, and the ripe cotton fiber surface becomes more compact and smooth. The method can maximally enhance the length of the cotton fibers by 16.935%, enhance the specific strength by 25.10% and enhance the fiber yield by 3.80%, thereby greatly improving the quality of the cotton fibers.