32results about How to "Low permanent deformation" patented technology

Bioresorbable thermoset elastomers and methods of making the same are disclosed. In certain embodiments, the thermoset elastomers include soft segments comprising branched polyesters, and hard segments including urethane and / or urea. The thermoset elastomers are made in certain embodiments by curing a branched prepolymer with a cross-linking agent. In certain embodiments, the mechanical properties of the thermoset elastomers are tailored by selecting the average molecular weight of the prepolymer, or by tuning the ratio of prepolymer to the cross-linking agent during curing, or by selecting a cross-linking agent with specific chemical characteristics.

Provided is a seal ring manufactured from a mixture containing a soft resin including at least one of a thermoplastic elastomer and a dynamic crosslinked resin, and a hard resin including a thermoplastic resin. With this seal ring, the adhesion to the inner peripheral surface of a housing can be maintained in a no-load state where a hydraulic pressure is not generated even after use as a one-piece type for an extended period of time and oil leakage can be effectively prevented. The mixture constituting the seal ring preferably has a compression permanent deformation of 95% or lower after immersion in an automatic transmission fluid at 150° C. for 100 hours.

The invention discloses a functionalized boride-filled silicone rubber-based heat-conducting material and a preparation method thereof. In parts by weight, the formula comprises: 100 parts of silicone rubber base material, 15-23 parts of hydroxyl silicone oil compound, functionalized boride 128 to 174 parts, 0.5 to 1 part of superfine silicon carbide, and 0 to 1 part of nano-tungsten oxide. The present invention uses silicone rubber as the matrix, mixes cubic boron nitride and hexagonal boron nitride with different particle sizes, combines and grinds the boron simple substance, and then disperses the functionalized boride as a heat-conducting filler, and then passes through gamma radiation. Combined, a functionalized boride-filled silicone rubber-based thermally conductive material with excellent performance can be obtained; the composite material not only has excellent thermal conductivity, but also has good mechanical and thermal properties, and can be customized according to actual use scenarios. Tailoring of the shape to batch manufacture complex shapes of thermally conductive device underlayers.

The invention discloses an LED lamp used for a distribution box. When a transparent board is struck, the transparent board has a buffering effect, so that the probability of damage to the transparent board is reduced, and no gap is formed when a lamp body is connected with the transparent board. The LED lamp comprises the lamp body (1) and further comprises the elastic transparent board (2), wherein the outer annular side face of the end of the lamp body (1) is covered with the inner annular side face of the transparent board (2), and the end face (3) of the end of the lamp body (1) is attached to the inner bottom surface of the transparent board (2). The transparent board (2) is composed of, by weight, 100 parts of pvc resins, 2-3 parts of stabilizing agents, 0.5-1 part of a lubricating agent, 0.001-0.0015 part of a coloring agent, 1-4 parts of impact modifiers and 2-5 parts of dioctyl phthalate.

The invention discloses a silicone rubber-based flexible neutron shielding material and a preparation method thereof. In parts by weight, the formula comprises: 100 parts of phenyl silicone rubber base material, 128-174 parts of functionalized borides, and hydroxyl silicone oil compound 15 to 23 servings. The invention adopts the phenyl-containing silicone rubber with a certain radiation resistance as the matrix, uniformly disperses the treated functionalized boride in it, and then cross-links through gamma radiation to obtain a silicone rubber with excellent comprehensive properties. Based flexible radiation shielding material; this flexible material not only has excellent neutron shielding effect, but also has good mechanical, thermal performance and environmental friendliness, and can be tailored in any form according to actual use scenarios.

The invention discloses a colored TPU foaming material, a preparation method and an application thereof. The colored TPU foaming material is composed of colored foaming particles or a colored foaming sheet, and the pigment in the colored foaming particles or the colored foaming sheet is The concentration of the pigment is 0.01-5wt%, and the pigment has the same concentration inside and outside the colored TPU foam material, the hardness of the colored TPU foam material is Shao A5-65, and the density is 0.05-0.5g / cm 3 , The average cell size is less than 100μm. The invention has the characteristics of good internal and external color uniformity, no wrinkles on the surface, and the like.

The invention relates to a self-lubricating addition type liquid silicone rubber, the liquid silicone rubber comprises the following raw materials in parts by weight: 120-200 parts of alkenyl-containing polysiloxane; 1-15 parts of hydrogenated polysiloxane; 30-80 parts Part fumed silica; 10-30 parts silazane silica treatment agent; 1-30 parts methyl phenyl silicone oil; 0.004-0.06 parts Si-H addition catalyst; 0.03-0.6 parts inhibitor. The present invention screens the type and amount of alkenyl-containing polysiloxane and hydrogenated polysiloxane in the gum base, component A and component B, controls the oil seepage rate and product performance through raw material screening and formula design, Therefore, an addition-type liquid silicone rubber with high tear resistance (≥45kN / m) and low permanent compression deformation (≤20%) is provided, and oil seepage is stable and long-term self-lubricating effect can be maintained. The self-lubricating addition type liquid silicone rubber provided by the invention has a simple preparation method, cheap and easy-to-obtain raw materials, and is suitable for industrial production.

The invention discloses an LED lamp for a distribution box. According to the LED lamp for the distribution box, a connecting gap cannot exist between a lamp body and a light transmitting plate when the light transmitting plate is collided mistakenly. The LED lamp for the distribution box comprises the lamp body (1) and the light transmitting plate (2). An annular protrusion (3) is arranged at the end of the lamp body (1). A first annular elastic body (4), the light transmitting plate (2), a second annular elastic body (5) and the annular protrusion (3) are sequentially sealed and bonded from top to bottom. The outer side of the first annular elastic body (4) and the outer side of the second annular elastic body (5) are both sealed and bonded with the inner side face of the lamp body (1). The first annular elastic body (4) and the second annular elastic body (5) are made of the same materials, and the materials comprise, by weight, 40-45 parts of chlorinated polyethylene, 10-15 parts of natural rubber, 5-8 parts of butadiene-styrene rubber, 3-5 parts of aromatic hydrocarbon oil, 1-2 parts of anti-aging agents, 0.5-1.5 parts of sulphur and accelerant, 0.3-0.4 part of co-crosslinking agent, 0.5-2 parts of zinc oxide and 20-30 parts of carbon black.