4 results about "Puncture resistance" patented technology

The invention provides an asphalt modified thermoplastic polyolefin water-proof coiled material and a preparation method thereof; the coiled material is characterized by consisting of an upper surface layer, a main body layer and a reinforcing layer; the upper surface layer is made from white or colored thermoplastic polyolefin with excellent ultraviolet radiation resistance, the main body layer is made from black asphalt modified thermoplastic polyolefin, and the reinforcing layer consists of a middle reinforcing layer and a surface lining layer which are arranged as required. The asphalt modified thermoplastic polyolefin water-proof coiled material has the advantages of good processing property, excellent mechanical property, high tension strength, good dimensional stability, strong puncture resistance, good ultraviolet radiation resistance, small specific gravity, capacity of realizing convenient seam suturing welding of the main body and recoverable tailing and excessive materials, and the like.

An injection needle has a puncture section having a small diameter that does not give a patient pain, injury, etc. and, moreover, does not make a patient feel fear and anxiety, a base end section with a large diameter to achieve a required flow rate and strength, and a tapered section connecting the puncture section and the base end section. The injection needle and a liquid introducing instrument can eliminate pain caused by a tapered section, and excellent puncture can be made with the needle and the instrument. An injection needle (1) has a puncture section (2) provided with a needle point that can be punctured into a living body, a base end section (3) having an outer and an inner diameter larger than the puncture section (2), a tapered section (4) connecting the puncture section (2) and the base end section (3). The tapered section (4) has smaller puncture resistance than the puncture section (2), or specifically, taper angle (A) is equal to or less than 2 degrees.

The invention discloses a tear-resistant blown film and a preparation process thereof, relates to packaging bags, and aims to solve the problem that normal use of a film bag is affected due to the fact that the film bag is prone to deformation under the pulling action of a hand, severe deformation and damage are caused, and the key point of the technical scheme is that the tear-resistant blown film comprises a base body of a cylindrical structure formed through blow molding, the base body comprises an inner layer and an outer layer, frosted parts located on the outer circumferential wall of the base body are formed on the surface of the outer layer, the multiple frosted parts are arranged in the length direction of the base body, and a cloth layer bonded with the base body is arranged between every two adjacent frosted parts. Through the arrangement of the cloth layer, the tear resistance and puncture resistance of the film can be improved, the service life of the film and the service life of a film bag can be prolonged, the high-density outer layer is made of a polyvinyl chloride material, polyvinyl chloride has the advantages of flame retardance (the flame retardant value is 40 or above), high chemical resistance and good mechanical strength and electrical insulating property, the comprehensive capacity of the film can be improved, and the service life of the film bag can be prolonged. And the strength is good.