3090 results about "Thermal shrinkage" patented technology

In the present invention, a thin film transistor is formed on a plastic film substrate (1) having anisotropy of thermal shrinkage rate or coefficient of thermal expansion in in-plane directions of the substrate. A channel is formed such thatthe direction (7) in which the thermal shrinkage rate or the coefficient of thermal expansion of the substrate is largest is nonparallel tothe direction (8) of a current flowing through the channel of the thin film transistor. Then, a thin film transistor having stable and uniform electrical characteristics, which is formed on the plastic film substrate, is provided.

The present invention relates to a high modulus macroscopic fiber comprising single-wall carbon nanotubes (SWNT) and an acrylonitrile-containing polymer. In one embodiment, the macroscopic fiber is a drawn fiber having a cross-sectional dimension of at least 1 micron. In another embodiment, the acrylonitrile polymer-SWNT composite fiber is made by dispersing SWNT in a solvent, such as dimethyl formamide or dimethyl acetamide, admixing an acrylonitrile-based polymer to form a generally optically homogeneous polyacrylonitrile polymer-SWNT dope, spinning the dope into a fiber, drawing and drying the fiber. Polyacrylonitrile/SWNT composite macroscopic fibers have substantially higher modulus and reduced shrinkage versus a polymer fiber without SWNT. A polyacrylonitrile/SWNT fiber containing 10 wt % SWNT showed over 100% increase in tensile modulus and significantly reduced thermal shrinkage compared to a control fiber without SWNT. With 10 wt % SWNT, the glass transition temperature of the polymer increased by more than 40° C.

A dicing sheet with a protective film forming layer has a substrate film, an adhesive layer, and a protective film forming layer, and at a minimum, the adhesive layer is formed in an area surrounding the protective film forming layer in a planar view, and the substrate film has the following characteristics (a)-(c): (a) the melting point either exceeds 130° C. or the film has no melting point; (b) the thermal contraction rate under conditions of heating at 130° C. for two hours is from −5 to +5%, and (c) the degree of elongation-to-break in the MD direction and the CD direction is at least 100%, and the stress at 25% is no more than 100 MPa.

The present invention provides a plasma resistant member having a reinforced mechanical strength and being sufficiently durable to exposure to a low pressure high density plasma. At least the surface of the alumina based material is formed of an oxide or composite oxide layer of a group IIIA element via an intermediate layer. It is preferable in the construction of the plasma resistant member that the intermediate layer comprises 10 to 80% by weight of the oxide or composite oxide of the group IIIA element in the periodic table and 90 to 20% by weight of alumina. The intermediate layer may also comprise a course ceramic with a porosity of 0.2 to 5%. It is also desirable that at least one of the conditions such as a difference in the thermal shrinkage ratio at 1600 to 1900° C. of 3% or less is provided.

[Problems] The present invention provides a-polyester-film superior in heat resistance, chemical resistance, insulation property and thermal dimensional stability, and suitable for application to fields associated with boiling or retort treatment, which require tenacity, pinhole resistance, bending resistance, bag breakage resistance on dropping, impact resistance and the like, fields requiring thermoforming or vacuum forming, and various uses such as packaging bags for water-containing food, pharmaceutical products and the like. [Solving Means] The polyester film characteristically shows an initial elastic modulus in at least one direction of 2.5-10 GPa, an impact strength of 40-10000 J/mm, a thermal shrinkage in at least one direction at 150° C. of −0.5% to 6%, a haze of 0.001% to 7%, and an absolute value of the difference in the thermal shrinkage between the longitudinal direction and the transverse direction of not more than 1.1%.

An organic/inorganic composite separator includes (a) a polyolefin porous substrate having pores; and (b) a porous active layer containing a mixture of inorganic particles and a binder polymer, with which at least one surface of the polyolefin porous substrate is coated, wherein the porous active layer has a peeling force of 5 gf/cm or above, and a thermal shrinkage of the separator after being left alone at 150° C. for 1 hour is 50% or below in a machine direction (MD) or in a transverse direction (TD). This organic/inorganic composite separator solves the problem that inorganic particles in the porous active layer formed on the porous substrate are extracted during an assembly process of an electrochemical device, and also it may prevent an electric short circuit between cathode and anode even when the electrochemical device is overheated.

The invention relates to a radiation crosslinking flame-retardant polyolefin thermal shrinking material, which comprises the following substances in weight portion: 100 portions of polyolefin base material, 0 to 100 portions of composite flame retardant, 1 to 3 portions of lubricating agent, 0 to 5 portions of color master batch, 1 to 5 portions of composite antioxidant and 0 to 2 portions of titanium pigment. The radiation crosslinking flame-retardant polyolefin thermal shrinking material can pass a thermal shock test, can be used for manufacturing various thermal shrinking devices, has the advantages of environmental protection, excellent insulating property, simple preparation method, easily bought raw materials and low cost, and is suitable for industrialized production.

In a nonwoven fiber assembly which comprises a fiber comprising a thermal adhesive fiber under moisture and in which the fiber are entangled with each other, the fibers are bonded at contacting points of the fibers by melting the thermal adhesive fiber under moisture to distribute the bonded points approximately uniformly, thereby obtaining a buffer substrate. The buffer substrate may further comprises a conjugated fiber comprising a plurality of resins which are different in thermal shrinkage and form a phase separation structure, and the conjugated fibers may have an approximately uniform crimps having an average curvature radius of 20 to 200 μm and are entangled with the fibers constituting the nonwoven fiber assembly. The buffer substrate can be obtained by a method comprising the steps of: forming a web from the fiber comprising the thermal adhesive fiber under moisture; and subjecting the obtained fiber web to a heat and moisture treatment with a high-temperature water vapor to melt the thermal adhesive fiber under moisture for bonding the fibers. The buffer substrate has a high air-permeability, an excellent cushion property and softness.

Laser for thermal shrinkage of soft tissue of uvula, soft palate, nasal turbinate or tongue base for the treatment of snoring, nasal obstruction or sleep apnea are disclosed. The preferred laser includes infrared laser about 0.7 to 1.85 micron, pulse duration about 100 microsecond to 5 seconds, spot size of about 2 to 5 mm and power of about 2 to 20 W at the treated area. The laser energy is delivered to the treated area by an optical fiber and a hand piece to cause a localized temperature about 65 to 85 degree Celsius for sufficient shrinkage of the treated soft tissues. Optical fiber bundles to produce high-power diode laser output or multi-wavelength are also disclosed.

The disclosed radiation crosslinking low-fume non-halogen/phosphate nano flame-retardant heat-shrinkable material contains the ethene/vinyl-acetate copolymer, ethene/octene copolymer, polymer solvent, organosilicon polymer, composite antioxidant, nano Mg(OH)2 flame retardant, ultrafine Al(OH)3 Mg(OH)2 with activating-treated surface, lubricant, and lubricant; and can be manufactured by sitrring, extruding, drawing, air cooling, cutting grain, radiating, stretching and cooling form. The product has super flame-retardant effect and affects little to environment or human after abandonment. The preparation method is low cost and fit to industrial production.

The invention discloses an inorganic/organic composite membrane which comprises a porous substrate and a porous insulating layer, wherein the porous insulating layer is attached to the porous substrate, and at least one surface of the porous substrate is coated with the porous insulating layer; the porous insulating layer comprises inorganic particles and a binding agent, wherein the inorganic particles are composed of n particles with different average particle diameters, n is large than or equal to 2, and the average particle diameters from the first type of inorganic particles to the nth type of inorganic particles are changed in a gradient manner. The invention further discloses a preparation method of the inorganic/organic composite membrane. The preparation method comprises the following steps: firstly, dissolving the binding agent into a solvent to form a polymer solution, then adding the inorganic particles, mixing to prepare the porous insulating layer, and then coating at least one surface of the porous substrate with the porous insulating layer. The invention further discloses a lithium ion secondary battery containing the membrane. The inorganic/organic composite membrane disclosed by the invention has the advantages of high stacking density, low thermal shrinkage rate, high puncture strength, simple preparation process and proper cost, and the lithium ion secondary battery containing the membrane has the advantages of good conservation rate of circulating volume and excellent safety performance and electrochemical performance.

The present invention relates to a heat shrink film for encapsulating articles comprising a core layer having an upper surface and a lower surface, a first skin layer on the upper surface of the core layer, and a second skin layer underlying the lower surface of the core layer, wherein the core layer comprises a blend of (i) at least one polyterpene and (ii) a syndiotactic polypropylene or a cyclic olefin copolymer, wherein the ultimate shrinkage of the film is at least 25% at 135° C.

A low-smoke and non-halogen poly-olefine material with radiant graft maleic anhydride vinyl-vinyl acetate multi-polymer as compatilizer is prepared by dissolving maleic anhydride 1-5 proportion into acetone, mixing with vinyl-vinyl acetate multi-polymer 100 proportion, volatilizing for acetone, granulating in double-screw extruder, and electronic-ray or gamma-ray radiating by electronic accelerator with 5-30KGy. The compatilizer graft rate is greater than or equal to 1%, it has better poly-olefine material performance, more white fire retardant and no need for anti-smoke agent. It can be used to make poly-olefine thermal shrinkage pipe with VW-1 vertical burning performance according to UL224 standard.

The invention relates to a material used for a halogen-free, flame retardant and thermal shrinkage sleeve and crosslinked wires and cables as well as the preparation method, aiming to provide a material and the preparation preparation method for halogen-free, flame retardant and thermal shrinkage sleeve and crosslinked wires and cables in diversified colors. The preparation method comprises the following steps: first, evenly mixing the compound formed by polyolefin copolymer, silicon rubber, halogen-free ammonium polyphosphate composite fire retardant, lubricant, colorant color master batch and antioxidant in specific proportions through a high speed mixer, then extruding and granulating the compound by means of the mechanical blending, finally turning out the material for producing the halogen-free flame retardant and thermal shrinkage sleeve and crosslinked wires and cables.

The invention provides a ceramic diaphragm and a preparation method thereof and an application of the ceramic diaphragm as a battery diaphragm. The ceramic diaphragm comprises a matrix and a ceramic coating, wherein the ceramic coating is attached to at least one side surface of the matrix; the ceramic coating contains inorganic ceramic powder and a one-dimensional nanometer material; the particle sizes of the inorganic ceramic powder are 5-250nm; the diameters of the one-dimensional nanometer material are 5-800nm; and the lengths are 500nm to 50 microns. The ceramic diaphragm not only has relatively high mechanical property and thermal shrinkage property, but also has good electrochemical properties and safety performance.

A pressure sensitive adhesive sheet according to the present invention is a resin laminate, including a high thermally shrinkable base layer having relatively high thermal shrinkage ratio, having a ratio (A:B) of the thermal shrinkage ratio in a main shrinkage direction [A (%)] to the shrinkage ratio in a direction perpendicular to the main shrinkage direction [B (%)] of 1:1 to 10:1, and a low thermally shrinkable base layer having relatively low thermal shrinkage ratio, the high and low thermally shrinkable base layers bonded to each other via a self-adhesive layer, wherein the resin laminate bends toward the high thermally shrinkable base layer side when heated from any one direction and can automatically curl from one terminal unidirectionally to form a tubular roll by further heating. The pressure sensitive adhesive sheet can be separated from an adherend smoothly when heated from any one direction. Thus, it can be used, for example, as a pressure sensitive adhesive sheet for semiconductor wafer polishing.

The utility model relates to a safety lithium-ion cell and a manufacturing method adopting a composite winding structure inside, which is characterized in that a composite diaphragm of at least two different properties is arranged inside the electrical core; wherein, one layer of the composite diaphragm is that microporous film of irradiation-crosslinking PDVF substrate coated on the pole piece; the other layer is that polyolefin microporous film with a shutdown temperature between 120 and 165 degree Centigrade. The chemical gel content formed in the PDVF microporous film after irradiation crosslinking is 25 to 85 percent, the thermal shrinkage rate within 100 - 220 degree Centigrade is less than 5 percent; and the anode uses preferably spinel manganate lithium.