80results about How to "Good elasticity recovery" patented technology

A connector assembly has a male connector (1) engaging with a female connector (2), and a latching mechanism is composed of a lockable lug (23) formed on a female housing (4) and a lock arm (10) formed on a male housing (3). Elastically deforming hinge-shaped feet (13) have each one end integral with the male housing and the other end continuing from the lock arm, whose pawl (11) corresponds to the lug (23), so that the lock arm (10) rocks about the feet to engage the pawl with the lug. A push lever (12) has lateral ends integral with the lock arm's rear end disposed in rear of the feet (13). A supplementary resilient arm (14) continues from the rear end to be inclined down and forwards. Its fore end is fixed on the outer surface of male housing (3), such that the housings are firmly locked together to give a stronger "click' feeling for detection of engagement, with wire ends from any foreign harness never catching the push lever.

Polyolefin block and graft copolymers comprised of two or more semicrystalline polyolefin blocks or grafts and one or more amorphous polyolefin blocks can be blended with a low molecular weight fluid diluent that preferentially locates within and swells the amorphous domains of the block or graft copolymer, while preserving the crystallinity of the semicrystalline block domains. After mechanical or thermomechanical processing, such compositions combine softness with high strength and high recoverable elasticity. Compositions are also disclosed whereby the diluent species is removed from the composition, either before or after the mechanical or thermomechanical processing, in order to create a strong elastic material with an ultra-low entanglement density within the amorphous domains.

The invention relates to an elastic fiber fabric, in particular to an elastic fiber fabric and a preparation method thereof. Warps and wefts are respectively 150D or75D PTS elastic yarns. The elastic fiber fabric is prepared through the steps of winding, twisting, sectional warping, healding, weaving, blank inspection, unrolling and flattening, pre-shrinking treatment, presetting, dyeing, reduction clearing and finishing. The elastic fiber fabric and a preparation method thereof have the advantages as follows: the structure is simple, the chemical fiber differentiation is promoted, the added value is increased, the preparation steps are scientific and reasonable and conform to the basic state policy of energy conservation and emission reduction, and the fabric feels like nylon, has a bright and pure color, is far lower than spandex in price and is a preferred garment material.

A copolycarbonate diol comprising:

• (a) recurring units each represented by the following formula (1):
• (b) recurring units each independently represented by the following formula (2):
  • wherein n is 4, 5 or 6; and
• (c) terminal hydroxyl groups, wherein the copolycarbonate diol has a number average molecular weight of from 300 to 20,000, and wherein the amount of the recurring units (a) is from 10 to 90% by mole, based on the total molar amount of the recurring units (a) and (b). A thermoplastic polyurethane obtained by copolymerizing the above-mentioned copolycarbonate diol with a polyisocyanate.

The invention discloses a method for preparation of modified asphalt with SBS and waste rubber powder as the modifier. The method adopts a physics and chemistry combined technology, uses a coupling agent to conduct chemical treatment on the modifier surface, so that a coupling effect can be generated between SBS and waste rubber powder, under a synergistic effect of EVA, extrusion molding granulation is carried out to obtain waste rubber powder/SBS/EVA blend particles. The blend particles are added into asphalt, shearing dispersion is performed, under a synergistic effect of a cross-linking agent and an antiaging agent, the modified asphalt with excellent high-and-low temperature performance, aging resistance, high elastic recovery, high 60DEG C dynamic viscosity and high temperature storage performance can be obtained. The modified asphalt product is applicable to drainage road pavements, steel bridge deck paving and old pavement reconstruction stress absorbing layers. The raw materials used by the method have wide sources, can be produced on existing SBS modified asphalt devices, and new equipment investment is unnecessary. Therefore, the modified asphalt is suitable for industrialized production and long distance transport.

Disclosed are (1) a thermoplastic elastomeric film comprised of an elastomeric arene-diene block copolymer and particular ethylene/.beta.-olefin copolymers having low ethylene crystallinity and (2) the process of preparing films thereof. The disclosed films have superior strength and elasticity characteristics which render them particularly useful in apparel and healthcare items such as disposable diapers.

The invention discloses high-viscosity high-elastic pitch and a preparation method thereof. The high-viscosity high-elasticity pitch prepared according to the invention has high viscosity and high elasticity as well as excellent workability, and meets the requirements of deformation resistance, fatigue resistance and long service life of large-span bridges, and with the high-viscosity high-elasticity pitch, the problem of poor workability of the existing high-viscosity high-elasticity pitch is solved; the viscosity of the pitch at 60 DEG C is larger than 80000 Pa.s, the viscosity at 135 DEG C is smaller than 3 Pa.s, the softening point reaches up to 85 DEG C above, and the cost is 20% lower than that of the common similar high-viscosity high-elasticity pitch in China at present.

The invention provides a preparation method for a water-leatherd wet-process microfiber leather. The preparation method comprises the following steps of preparing non-woven leather cloth; carrying outwater-soluble polyester pre-shrinking treatment on the non-woven leather cloth; carrying out waterborne polyurethane wet-process impregnation treatment; carrying out extruding; carrying out wet-process solidification; carrying out splitting and reduction; and carrying out post-processing. The preparation method has the advantages that the key of the method lies in how to avoid using an organic solvent in the whole producing and manufacturing processes, a water-leatherd wet process is adopted, so that all process materials are environmentally-friendly, and the prepared leather can achieve thestructural characteristics of leatherette; and a figured sea-island short fiber leather material is used, ultrafine fibers with the fineness of 0.05 D can be obtained after sea components are dissolved away, and prepared leather is soft in hand feeling, good in drapability, attractive and good in air permeability, is similar to real leather in strength, folding resistance and other performances, is superior to natural leather in water resistance and anti-mildew and antibacterial performance and is a novel material with vitality in the industry of artificial leather and synthetic leather.

A vacuum receptacle lid for easy sealing includes a lid body that closes and opens an inlet portion of a receptacle body provided with a space containing contents, and includes a valve installation hole formed at a part thereof, at least one air vent hole, and a packing installation groove which is opened downwardly in a C shape inside a rim thereof, a check valve that is provided a combining projection at a bottom surface of a body portion enclosing the air vent hole, is inserted into and combined with the valve installation hole, and exhausts air of the inside of the receptacle body via the air vent hole and blocks inflow of external air by enclosing, opening and closing the air vent hole, and a packing that is accommodated and installed at the packing installation groove, and includes an upper contact portion coming into contact with an upper surface of the packing installation groove, a lower contact portion coming into contact with the receptacle body, and an intermediate contact portion of which ends are connected to at least a part of the upper contact portion and the lower contact portion and which has a cross-section of a zigzag shape.

The invention discloses a hindered phenol/montmorillonoid/nitrile rubber composite damping material for a car. The hindered phenol/montmorillonoid/nitrile rubber composite damping material comprises raw materials including, by weight, 40-60 parts of nitrile rubber, 30-40 parts of chlorinated butyl rubber, 128-160 parts of tetrahydrofuran, 42-61 parts of maleic anhydride, 2-6 parts of benzoyl peroxide, an appropriate amount of ethyl alcohol, 1-3 parts of hydroxide sodium hypophosphite, an appropriate amount of xylene, 24-33 parts of softwood celluloses, 1-2 parts of stearic acid, 2-7 parts of carbon black, 1-2 parts of sulphur, 4-7 parts of montmorillonoid, 2-4 parts of hindered phenol HP1098, an appropriate number of calcium chloride solution and an appropriate amount of deionized water. According to the hindered phenol/montmorillonoid/nitrile rubber composite damping material, the maleic anhydride and the nitrile rubber are grafted, and are then grafted with the softwood celluloses for compounding; on one hand, internal friction resistance of rubber molecular chain activity is strengthened, and the damping performance of the material is strengthened; and on the other hand, the character of the softwood celluloses is used for improving the sound absorption and noise lowering performance of the damping material, and the nitrile rubber damping material which is excellent in sound absorption and noise lowering performance is prepared.

The invention provides high-temperature-stable type modified asphalt. The high-temperature-stable type modified asphalt is prepared from the following components: matrix asphalt, rubber powder, natural rubber, aromatic lightweight oil, polyester fibers, polyethylene and sulfur; a preparation method comprises the following steps: (1) heating the matrix asphalt to 200 to 210 DEG C; then adding the matrix asphalt into a stirring tank; adding the rubber powder and the natural rubber into the stirring tank, and continually stirring for 30 to 40min to obtain a mixture I; (2) adding the aromatic lightweight oil, the polyester fibers and the polyethylene into the stirring tank respectively and carrying out primary stirring; when the temperature in the stirring tank is 150 to 160 DEG C, adding thesulfur and carrying out secondary stirring to obtain a mixture II; (3) pumping the mixture II into a development tank, wherein the fermentation time is 45 to 55min; cooling to obtain the high-temperature stable type modified asphalt. The high-temperature stable type modified asphalt provided by the invention has the advantages of high stability and good elastic recovery; the preparation method issimple, has an easy-to-control process and is applicable to popularization and application.

A retaining tool for a heat sink includes a frame, at least an operation member and at least an engaging member. The frame is attached to an upper portion of the heat sink with a projection at two opposite sides thereof and the projection has a contact face. The operation member provides a main operation part and a stir part. The main operation part is disposed on top of the contact face and the stir part is angularly lifted for the main operation part being capable of moving relative to the contact face. The engaging member further has a follower part piercing the projection with an end of the follower part connecting with the main operation part pivotally and another end of the follower part being joined to a first elastic part and a second elastic part respectively. The first elastic part extends curvedly a circular bend outward the heat sink and the second elastic part extending curvedly another bend inward the heat sink and free ends of both the elastic parts are joined to two opposite lateral sides of an engaging part for controlling the engaging force evenly and decreasing plastic deformation.

The invention relates to a pallet with stepladder-like support plates and method of manufacturing the same. The pallet includes a cargo layer and a base layer. The base layer includes a pair of spaced apart end deck boards, and a pair of spaced apart connector boards orthogonal to the pair of spaced apart end deck boards. Spaced apart support blocks are between the base and cargo layers, and form a gap therebetween for receiving a lifting member. In addition, each supports block includes a stepladder-like top surface which is provided with a first horizontal plane for accommodating a terminal cover panel and a second horizontal plane for accommodating a connector panel.

The invention discloses emulsified asphalt with high viscosity and high elasticity and a preparation method of the emulsified asphalt. The emulsified asphalt is prepared from asphalt stock, waste tirerubber powder, a tackifier, an emulsifier, a thermoplastic elastomer, water, carbon black, an antiaging agent, modified calcium carbonate and a surfactant; the emulsified asphalt with high viscosityand high elasticity is prepared by steps as follows: the waste tire rubber powder pulverized by a pulverizer, the tackifier, the emulsifier, the thermoplastic elastomer, water, carbon black, the antiaging agent, modified calcium carbonate and the surfactant are added to the molten asphalt stock. Through the adoption of the method, reaction temperature can be reduced, asphalt aging is prevented, release of toxic gas is reduced, resource saving and environment protection are realized, and operation is simple; the prepared modified asphalt mixture has higher bend resistance, break resistance, high-temperature resistance and the like, and the application range of the modified asphalt is enlarged.

The present invention provides a safety sheath for hypodermic syringe needle comprising a proximal mounting ring, a distal mounting ring and a shielding sheath. The shielding sheath includes two symmetrical slits, two symmetrical semicircular aprons and an inward annular fillet, which is bisected into two symmetrical curved segments with crescent thickness, namely marginal thickness is less than central thickness. During sleeving the shielding sheath over the distal mounting ring and proximal mounting ring, both symmetrical semicircular aprons are outwardly hauled by outwards forces such that the bore profile of the inward annular fillet is dilated into circular shape, which will not only facilitate subsequent sleeving process without difficulty but also enhance the tightness for the latch of the shielding sheath with the distal mounting ring in locked manner without any possibility of mutually slipping displacement so that medical personnel in handling can prevent from accidental pricks by hypodermic needle.