104 results about "Thermal creep" patented technology

The present invention significantly modifies “The Overflow Process”. It includes a method and apparatus for measuring glass flow rate and maintaining a constant glass flow rate. It also embodies design features and methods that support and stress the forming apparatus in a manner such that the deformation that results from thermal creep is corrected, thus minimizing the effect of the thermal creep on the thickness variation of the glass sheet. The present invention also embodies design features that change the process from a single step (combined flow distribution and cooling) to a two step process; step one being flow distribution and step two being cooling.

The present invention alters the flow path at the inlet of the sheet glass forming apparatus to improve quality. The bottom of the downcomer pipe is preferably shaped to alter the character of the vortex flow in the quiescent flow zone between the pipes. In another embodiment, a bead guide provides hydraulic stresses that are in opposition to the surface tension stress and thus reduces the influence of surface tension on the formation of thick beads on the edges of the sheet. The present invention also measures the temperature of the glass by immersing thermocouples in the glass, at locations where any defects caused by the immersion are in the glass that forms the unusable edges of the sheet. In another embodiment, the support structure for the trough is altered to substantially reduce the aging of the trough due to thermal creep.

The present invention relates to a rotational moulding cross-linked polyethylene special-purpose material. It contains the following components: (by total weight of linear low-density polyethylene and low-density polyethylene) A. linear low-density polyethylene 70-90%; B. low-density polyethylene 10-30%; C. cross-linking agent 0.5-5%; and D. antioxidant 0.1-1%. Said invention also relates to a preparation method for using said special-purpose material. The special-purpose material composition can be molten and mixed in a mixer or twin screw extruder machine, blending temp. is 130-170 deg.C, the invented polyethylene special-purpose material can be obtained. The rotational moulding product prepared by said special-purpose material has good working property, high resistance to implact shock, good resistance to thermal creep and low-temp. toughness, etc.

The present invention discloses improved methods and apparatus for forming sheet glass. In one embodiment, the invention introduces a counteracting force to the stresses on the forming structure in a manner such that the thermal creep which inevitably occurs has a minimum impact on the glass flow characteristics of the forming structure.

The present invention relates to slow-crystallizing, titanium-catalyzed polyethylene terephthalate resins that are useful for making high-strength, high-clarity bottles that possess improved resistance to stress cracking and thermal creep. The polyethylene terephthalate resins possess improved reheating profiles and are especially useful for making polyester articles that have exceptional clarity, dimensional stability, and thermal stability.

The invention relates to a crosslinked polyethylene single-purpose material for rotational moulding which comprises (by weight percent) linear low density polyethylene 70-90%, low density polyethylene 10-30%, cross linking agent 0.5-5%, anti-oxidant 0.1-1%. The invention also relates to the process for preparing the special-purpose material. The rotational moulding product prepared by the single-purpose material has good processing characteristics, fine impact strength, thermal creep resistance and low-temperature flexibility, good penetrability resistance and chemical environmental resistance.

One embodiment of the present invention is an improved sheet glass forming apparatus. In another embodiment, a precise thermal control system redistributes the flow of molten glass at the weirs to counteract the degradation of the sheet forming apparatus which inevitably occurs during manufacturing. In yet another embodiment, the invention introduces a counteracting force to the stresses on the trough in a manner such that the thermal creep which inevitably occurs has a minimum impact on the glass flow characteristics of the forming trough. Another embodiment creates a variable external cross-section which provides hydraulic stresses that are in opposition to the surface tension and body force stresses and thus, reduces the influence of surface tension and body forces. In an alternative embodiment, the glass is preferentially cooled across its width to create forming stresses during solidification, which ensures that the glass sheet drawn is inherently flat. In an additional embodiment, the internal pressure is adjusted in each of the major components of the forming apparatus such that the pressure difference across any leakage path to the forming zone is essentially zero. Therefore, air leakage in the apparatus is minimized even though the cracks and openings exist during initial operation and develop during manufacturing.

The invention relates to a preparation method for a self-adhesive modified asphalt waterproof coiled material with cement reactivity. According to the technical scheme, the method comprises the following steps of coating on one or two sides of a base reinforcement layer with modified asphalt pressure sensitive self-adhesive glue with cement reactivity to form (a) modified asphalt pressure sensitive self-adhesive glue layer(s) by using an oil coating roller pair, and wrapping the modified asphalt pressure sensitive self-adhesive glue layer(s) with (an) anti-sticking separation film(s) to prepare a self-adhesive modified asphalt waterproof coiled material product with cement reactivity. The method has the beneficial effects that the modified asphalt pressure sensitive self-adhesive glue is used, so that the coiled material is endowed with a cement mortar adhesion characteristic, and has a thermal creep characteristic, the problem that an adhered surface is polluted by dust and the like on a construction site is effectively solved, and the range of construction application temperature of the coiled material is widened; the modified asphalt pressure sensitive self-adhesive glue is permanently and organically combined with concrete of a structural layer, and the hidden danger of water mixing is avoided; the reliability of a waterproof layer is improved, and unique self-healing capability for slight construction damage is achieved.

The invention discloses a high isotactic polypropylene alloy material and a preparation method thereof. The material contains 5-98.9 parts by weight of polybutylene, 1-80 parts by weight of polypropylene and 0.1-15 parts by weight of propylene-butene copolymer; the isotacticity of the high isotactic polypropylene is larger than 85%, and the smelting point of the high isotatic polypropylene is 115-129 DEG C; the isotacticity of the high isotactic polypropylene is larger than 85%, and the smelting point of the high isotactic polypropylene is 155-169 DEG C; the propylene-butene copolymer contains a random copolymer and a segmented copolymer of propylene-butene. The preparation method uses a titanium/vanadium supported catalyst and adopts a multistage sequential polymerization manner and specifically comprises the steps of carrying out propylene polymerization or butane-1 polymerization, then initiating butane-1 polymerization or propylene polymerization, and respectively carrying out propylene polymerization or butane-1 polymerization, and so on to synthesize the high isotactic polypropylene alloy material. The material is a powdery or spherical product, and has the advantages of excellent impact resistance, thermal creep resistance and low shrinking percentage of polybutylene, high modulus, high surface hardness and fast setting of polypropylene, and the like.

The present invention discloses improved methods and apparatus for forming sheet glass. In one embodiment, the invention introduces a counteracting force to the stresses on the forming structure in a manner such that the thermal creep which inevitably occurs has a minimum impact on the glass flow characteristics of the forming structure.

The invention provides a photocurable composition, a cured object of the photocurable composition, an optical equipment component with the cured object, a set of optical equipment, and a manufacturing method of a display module with the photocurable composition. The photocurable composition has excellent thermal creep resistance, excellent operability, excellent durability and excellent binding performance. Furthermore thick film of the photocurable composition can be cured. The solution of the photocurable composition is characterized in that the photocurable composition comprises the components of: (A) a (methyl)acrylate series polymer with more than 0.8 crossed organosilyl in one molecule, (B) a composition of the (methyl)acrylate series group comprising the (methyl)acrylate series group represented by a general formula (1), (C) a curing catalyst, (F) an optical free radial and (I) a resin filler with an average particle diameter of 1-150 mu m. -OC(O)C(R1)=CH2...(1) (wherein in the general formula (1), R1 represents a hydrogen atom or an organic group with number of carbon atoms in 1-20.).

The present invention discloses improved apparatuses for forming sheet glass. In one embodiment, the invention introduces a structural web that supports the forming structure in a manner such that the thermal creep which inevitably occurs has a minimum impact on the glass flow characteristics of the forming structure.

The disclosure is directed to methods, systems, and apparatus for obtaining flame-perforated films which reduce or eliminate skewing of perforations in such films caused by thermal creep, whereby the film has perforations arranged to provide controlled tear characteristics, especially in both the lengthwise or machine direction (MD), and the crosswise or transverse direction (TD).

The invention relates to a preparation method of a metallic/intermetallic compound laminar composite material. The preparation method comprises the followings steps: performing surface treatment on selected boards, further carrying out roll cladding, annealing treatment, casing removing and in-situ reaction by combining the thermal creeping forming technology when necessary. The metallic/intermetallic compound laminar composite material prepared by adopting the preparation method has the following progresses: the cost of raw materials is relatively low, the technology is mature, the efficiency is relatively high, the consequent in-situ reaction time is shortened, and the metallic/intermetallic compound laminar composite material with a complex curved structure can be prepared.

The invention belongs to the field of photovoltaic encapsulation adhesive films and preparation thereof, and particularly relates to a silane grafted POE photovoltaic encapsulation adhesive film and apreparation method thereof. The silane grafted POE adhesive film comprises the following components in parts by mass: 100 parts of ethylene-octene copolymer resin, 0.3-3 parts of silane grafted monomer, 0.05-0.25 parts of an initiator, 5-20 parts of modified resin, 0.05-0.25 parts of co-grafted monomer, 0.5-4 parts of a compatilizer, 0.05-0.3 parts of an ultraviolet light stabilizing agent, 0.05-0.3 parts of an ultraviolet absorber and 0.1-0.6 part of an antioxidant. The prepared adhesive film for POE photovoltaic encapsulation can be simultaneously applied to a flexible thin-film photovoltaic assembly and a traditional crystalline silicon photovoltaic assembly, the problems of air bubbles, no-melting and poor thermal creep resistance in an ageing process can be solved, the laminating time of the assemblies is shortened, the packaging defective percentage is reduced, the production efficiency of the assemblies is improved, and the production cost is reduced.

The invention discloses a polyolefin alloy material and a preparation method thereof, belongs to the field of polyolefin materials and in particular relates to a polyethylene/highly isotactic polybutene alloy material and a preparation method thereof. According to the polyethylene/highly isotactic polybutene alloy material disclosed by the invention, the mass content of polybutene is 10-98.9 percent (the isotacticity is more than 85 percent), the mass content of polyethylene is 1-80 percent, and the mass content of a butane-ethylene copolymer is 0.1-10 percent. By utilizing the supported titanium and/or vanadium catalyst, the polyethylene/highly isotactic polybutene alloy material is synthesized by virtue of two-section polymerization, and the obtained polybutene alloy is a powdery or spherical product with a core-shell structure, has the advantages of excellent impact resistance, thermal creep resistance and low shrinkage rate of polybutene-1 and high modulus, high surface hardness and quick setting property of polyethylene, is used for manufacturing pipes and pipe fittings and performing toughening modification on polypropylene, or can serve as a universal polyolefin material and is a novel polyolefin material.