9 results about "Flexural modulus" patented technology

This application belongs to the field of polymer materials technology, specifically disclosing a modified PC / ABS alloy and its preparation method. By weight, it comprises: polycarbonate: 50-80 parts; ABS resin: 15-40 parts; comb-shaped reactive compatibilizer: 3-8 parts; halogen-free flame retardant: 8-18 parts; nano-talc powder: 3-10 parts; core-shell toughening agent: 2-8 parts; antistatic agent: 0.5-3 parts; antioxidant: 0.2-0.8 parts; lubricant: 0.2-1.0 parts. The tensile strength (56.3-66.8 MPa), flexural strength (88.4-98.5 MPa), flexural modulus (2480-2780 MPa), and notched impact strength (23℃: 52.4-62.5 kJ / m) are also disclosed. 2 -30℃: 28.5~36.2kJ / m 2 Heat distortion temperature (110~125℃), limiting oxygen index (30.0~32.0%), flame retardant rating (V-0), and surface resistivity (5.2×10⁻⁶) are also specified. 9 ~2.5×10 10 In terms of Ω), it is better, and the high performance of PC / ABS alloy is achieved by using reactive compatibilizers, nano talc powder, phosphorus-nitrogen-silicon ternary synergistic flame retardant system, core-shell toughening agent and polymeric antistatic agent.

To provide a dental block material using a thermoplastic resin that is easy to process with CAD / CAM and has sufficient hardness for use as a CAD / CAM processed product. [Solution] The dental block material according to the present invention is made of a thermoplastic resin having a Vickers hardness of 20HV0.2 to 35HV0.2 as defined in JIS Z 2244, a flexural strength of 150MPa to 250MPa and a flexural modulus of 2 to 10GPa as defined in JIS T 6517:2011.

This invention relates to the field of propylene polymerization, and discloses a polypropylene, its preparation method, and its applications. The polypropylene has a molecular weight distribution of 6-20; at 230℃, a melt index of 0.1-10 g / 10 min with a loading of 2.16 kg; an isotactic index ≥97%; a fraction with a weight-average molecular weight M ≥ 5 million g / mol containing ≥1 wt%, a fraction with 1000 g / mol < M < 50000 g / mol containing 5-30 wt%, a fraction with 50000 g / mol ≤ M < 5 million g / mol containing 60-90 wt%, and a fraction with M ≤ 1000 g / mol containing <1 wt%; a melt strength ≥0.4 N at 230℃; a heat distortion temperature ≥95℃; and a flexural modulus ≥1800 MPa. This polypropylene exhibits high isotacticity, a wide molecular weight distribution, high flexural modulus, and also high melt strength and heat resistance.

This sealing ring comprises: a first ring having an inner circumferential surface and an outer tapered surface that is inclined with respect to the inner circumferential surface; and a second ring having an outer circumferential surface and an inner tapered surface that is inclined with respect to the outer circumferential surface and that faces the outer tapered surface. One of the first ring and the second ring is formed of a first resin having a flexural modulus of less than 700 MPa, and the other is formed of a second resin having a flexural modulus of at least 700 MPa. When the first ring is formed of the first resin, the seal ring seals fluid on the outer circumferential surface side of the second ring. When the second ring is formed of the first resin, the seal ring seals fluid on the inner circumferential surface side of the first ring.

Provided is a two-component liquid resin composition comprising a first liquid and a second liquid, wherein: the first liquid contains an epoxy resin (A) and an inorganic filler (C); the second liquid contains a curing agent (B) and the inorganic filler (C); and the stress coefficient ɑxE, calculated as the product of a linear expansion coefficient ɑ and a flexural modulus E, is at most 190.

This utility model relates to the technical field of bending modulus testers, and discloses an auxiliary alignment structure and a bending modulus testing device for sheet metal. The device includes a mounting base with a groove inside. Sliding blocks are slidably connected to both ends of the groove. A bidirectional lead screw is rotatably connected to the middle of the mounting base. The threaded grooves at both ends of the bidirectional lead screw are in opposite directions. The two ends of the bidirectional lead screw are threadedly connected to two sliding blocks respectively. A support is fixed to the top of each sliding block, and a collecting block is slidably connected to the outside of the support. Because the sliding blocks fixed to the bottom of the two supports are threadedly connected to the bidirectional lead screw, and the threaded grooves at both ends of the bidirectional lead screw are in opposite directions, the two supports move synchronously, ensuring that the pressure head is always in the middle position between the two supports. This makes adjusting the supports simpler, more convenient, and easier to operate.

This invention provides a cutting component that exhibits excellent machinability and suppresses burr formation during machining operations such as cutting, slicing, or drilling using mechanical tools. The cutting component is a molded body comprising a resin composition containing a thermoplastic resin (A) and a reinforcing material (B), wherein the thermoplastic resin (A) is an amorphous thermoplastic resin, and the reinforcing material (B) is an inorganic reinforcing material with a Mohs hardness of 5 or less. The cutting parameter of the cutting component, defined by the following formula (1) based on the breaking toughness K1c and flexural modulus, is 15m. 1／2 ~100m 1／2 Machinability parameter = (Failure toughness K1c / Flexural modulus) × 10 5 ・・・Form (1)

The present invention relates to a cardiac lead body having optimized torque (torsion) transmission properties by virtue of a choice of one or more materials having a specific combination of hardness and flexural modulus. The invention also relates to the lead comprising such a lead body, and to the use of a polymer material having a specific hardness and flexural modulus for the manufacture of a structural element of an implantable cardiac lead body. The implantable cardiac lead body (1) has a proximal end, a distal end and an outer transverse diameter less than or equal to 2.5 mm, preferably less than 1.7 mm, the lead body comprising predominantly by weight at least one polymer material as a structural matrix (2), the at least one polymer material having a Shore hardness of between 75A and 65D, preferably between 85A and 60D, as measured according to ASTM D2240 or ISO 48-4, and a flexural modulus of between 1300 and 26000 psi, preferably between 10000 and 20000 psi.