76 results about "Celluloid" patented technology

The invention is directed on the one hand to a celluloid-free table-tennis ball, preferably having a diameter of 38.5 to 48 mm, a weight of between 2.0 and 4.5 grams and a shell thickness (approximately) of between 0.20 mm and 1.30 mm, the shell being composed of plastic whose principal constituent is an organic, non-crosslinked polymer which in its main chain has not only carbon atoms but also heteroatoms; and on the other hand also to a method of manufacturing a table-tennis ball of this kind, where mostly in a first step two or more shell parts are manufactured, these shell parts being assembled in a subsequent step.

The invention discloses a celluloid substituted material for table tennis and a manufacturing method. The material is very close to the celluloid in mechanical and processing properties and can be used for producing table tennis instead of celluloid. The main component of the material is cellulose acetate, and the auxiliary materials are a plasticizer, a reinforced material and pigment. The manufacturing method of the material is as follows: the raw materials are subject to high speed mixing and then extruded into pieces by a double screw extruder and a hanger-shaped handpiece, the thickness is adjusted by a three-roller calendar, and the pieces are subject to cooling and drawing treatments and then cut into sheets according with certain length and width production requirements of table tennis. The celluloid substituted material for table tennis is safe and environmental-friendly and is very close to the celluloid in mechanical and processing properties; and meanwhile the manufacturing method uses standard general equipment, so the maintenance and replacement of the equipment are very easy, and the manufacturing process can be ensured to efficiently perform at a high speed.

The compound polymer resistor film humidity-sensitive element is produced on ceramic substrate and through vaporization coating 5-8 pairs of gold finger electrodes, soaking in humidity-sensitive liquid to form humidity-sensitive film, soaking in acetone solution of celluloid to form protective film, heat treatment, and electrical ageing at high temperature and high humidity environment. The said process can produce humidity-sensitive element with wide humidity measuring range, linear response, high sensitivity, fast response, high humidity environment tolerance, good repeatability, high long-tern stability and excellent humidity response characteristic, and can be used in precise measurement and control of environment humidity.

The invention discloses a special adhesive for a thermoplastic PVC table tennis. The special adhesive mainly comprises a raw material having dissolving and adhering effects on PVC, a diluent and a stabilizer as auxiliary materials. The table tennis finished product adhered by virtue of the special adhesive has no white flower and traces; mechanical properties such as hardness and strike resistance of the table tennis adhering part have no difference from those of other parts and the special adhesive achieves the same technical standard as celluloid.

A method of manufacture of foamed celluloid molded products, involving three steps for the manufacture of higher density (0.7 to 1.25 gm/cc) foamed celluloid products or simple geometry lower density (0.2 to 0.7 gm/cc) foamed celluloid products, and four steps for the manufacture of lower density foamed celluloid products of any geometry. The three step process involving: (1) providing small, uniform, pieces of celluloid; (2) presoaking the pieces in a physical blowing agent (PBA) under pressure; and (3) foaming at raised temperature a controlled quantity of the presoaked pieces in a mold—to obtain the desired shape and density. For a lower density foamed celluloid product, of any moldable geometry, the steps are to: (1) small pieces of celluloid, that (2) have been presoaked in a PBA, are (3) pre-expanded to an intermediate density, and then (4) foam the desired lower density foamed product in a mold at raised temperature.

By using generally known chemically, physically, or a combination thereof, means to foam celluloid, a foamed celluloid material is invented with a density of less than about 1.25 gm/cm³, which material is relatively low cost, very fast burning, very low residue, easily moldable, and which material exhibits good mechanical strength, and provides a good water barrier. These characteristics make this foamed celluloid a preferred choice for military artillery propellant charge bags, military mortar and civilian fireworks increment charges, combustible cartridges, flare housings, igniter tubes, as well as, closure disks, combustible enclosures and components thereof, among other applications.

A method for coating thermoplastic resin beads for use in imitation pearls includes the steps of: applying to celluloid a surface treatment compound (A) dissolved into a mixed solution of acetone, ethylacetate, butylacetate, and benzene; coating the surface treated celluloid with compounds for an under coat and a mid coat, each compound being obtained by dissolving celluloid into a mixed solution of ethylacetate and amylacetate, and adding a pigment thereto; and coating the celluloid with a compound for a top coat (D) that is prepared by dissolving celluloid into ethylacetate, and adding a pigment thereto.

The invention belongs to printing plate-making field, especially refers to high image contrast silver halide emulsion and the manufacturing method in silver salt diffusion abevacuation plate-making system, and the application in the high image contrast CTP plate and CTP offset printing plate. The emulsion includes chlorobromide and chloride silver iodide, aurothio chemical induction enhancing agent, triaindole pyrazine stabilizer, colorant light spectrum induction enhancing agent, celluloid and water, the emulsion also includes iridium salt, rhodium salt or the compound of them with any ratio.

A method for classifying projection recaptures is disclosed. A copy of a video content is classified as recorded from the digital projection of the video content, or as recorded from the projection of the celluloid film print of the video content by an automated method comprising classifying as a function of at least one feature extracted from a digital representation of the copy, among (i) spatial illumination uniformity; (ii) on-screen vertical stability; and (iii) temporal illumination pulse.

The invention provides a celluloid sheet material for a table tennis. The celluloid sheet material comprises nitrocellulose, camphor powder, zinc oxide, acetic ester, a solvent, a flexibilizer, ethanol, acetone, a filling material, a coupling agent, and a pigment. The celluloid sheet material prepared by the formula has characteristics of high strength, good toughness, stable center of gravity, good elasticity, good ball sense responded from athletes, and high surface smoothness. Tributyl acetylcitrate is added into a conventional solution; the defect that the conventional solution is easily volatile is overcome; and the solubility and uniformity of nitrocellulose and camphor powder are further improved.

The invention discloses a nitrocotton for flame-retardant celluloid and a preparation method of the nitrocotton product. The effective material compositions of the nitrocotton for the flame-retardant celluloid comprise celluloid-grade nitrocotton and a fire retardant; the preparation method comprises the following steps: dissolving the fire retardant into an organic solvent comprising a ketone or alcohol ether mixture or single alcohol; after stirring the solvated materials, adding nitrocotton to the solution; using manual work or a kneader to knead and plastify the materials, and drying after taking from the pot, so as to prepare the nitrocotton for the flame-retardant celluloid; using a calender to press the prepared nitrocotton to form a plate, drying and polishing the plates to obtain the flame-retardant celluloid plate as the flame-retardant celluloid nitrocotton product. The flame-retardant celluloid nitrocotton or the celluloid plate prepared from the material formula and prepared by the preparation method is an article that is difficult to ignite with soft fire or slow in burning speed even on fire, and can be self-quenched after getting away from the fire, is simple in formula, convenient to prepare, and good in safety performance, and has good economic benefits and social benefits.

The invention discloses preparation methods for a difficult-flammability celluloid raw material, and plates, bars and industrial products thereof; difficult-flammability celluloid nitrocotton comprises effective material ingredients: 50%-75% of celluloid-graded nitrocotton, 20%-40% of a flame retardant, and 0-15% of an auxiliary agent; the flame retardant is added in an organic mixed solvent and is stirred until the flame retardant is dissolved; then the nitrocotton and the auxiliary agent are added, kneading is performed, and thus a difficult-flammability celluloid plasticzed material mass is obtained; the plasticized material mass is subjected to processing treatment by a spiral granulator, difficult-flammability celluloid material particles are obtained, and the plates, bars and industrial products thereof are prepared by a molding process. The invention also provides a manufacturing method of difficult-flammability celluloid which is scientific in formula and convenient to prepare, is obtained by only adjusting the formula under a principle without changing a conventional product production device and process production route, is flame-retardant and also has self extinguishing properties even if on fire.

The invention discloses a enzymoimmunoassy absorption test agent box adapted on fenitrothion remain analysis which includes a box, 96 hole or 40 hole enzyme labeling board or test tube set in the box and the antigen in the box. In each hole on the enzyme labeling board, envelope antigen which is able to unite with fenitrothion antigen, is enveloped by parisarc liquor, and then sealed with celluloid of 2 percents to 5 percents. Antigens in the box consists of washing solution, basal material dilution, fenitrothion standard solution, fenitrothion antigen (indirect ELISA), sheep rabbit antigen labeled with horse radish peroxidase (indirect ELISA), or fenitrothion rabbit antigen labeled with horse radish peroxidase (direct ELISA), basal material, coloration matter and reaction termination liquor. The invention can be used on fast detecting of fenitrothion remain in water, soil, vegetable, fruits and poisoned sample. The pre-process of the sample is simple and can detecting groups of samples at the same time. The sample detecting cost is lower than traditional detecting method.

The invention unfurls a kind of float choosing slot for taking off ink of high effect. Compared with the current technique, the invention makes these changes: (1) add water current occur fix in front of the stairs spreading fix, the mixing equipment is made by air fix and water current occur fix; (2) change the last tube of the stairs spreading fix to the gradual spreading tube; (3) in the float choosing slot, there is float board and formatting the paragraph. By the float board, we can control the liquid stopping time in the float choosing slot, make the ink grains float to the surface, collect them by most in the spirit collection slot.

An economical, low residue, mortar increment propellant container manufactured of foamed celluloid, which is composed of 50 to 84% nitrocellulose, having a nitrogen content of from about 10.5 to about 13.5%, and about 15 to about 50% camphor. The burn rate of the foamed celluloid can be enhanced by the addition of energetic additives, such as energetic plasticizers.

The invention provides a waterborne wood celluloid paint suitable for all bottoms, which is prepared from the following components in percentages by weight: 55-75% of acrylic resin, 5-25% of waterborne polyurethane resin, 0.2-3% of a water-based defoamer, 0.2-3% of a water-based wetting agent, 0.2-5% of water-based flatting agent, 0.2-5% of a penetrant, 1.8-6% of a surfactant, 0.2-2% of a wear-resistant assistant, 3-8% of colloidal silica, 0.5-2% of a water-based thickener and the balance of water. The formaldehyde emission of the obtained wood celluloid paint is lower than that of a common water-based paint; furthermore, addition of a volatile organic compound is completely eradicated at the source and the harm of formaldehyde and the volatile organic compound to a human body is avoided; and furthermore, the obtained bottom general waterborne wood celluloid paint can be repeatedly sprayed or painted, and is good in rubbing property and filling property and adjustable in fullness and glossiness.