4results about How to "Excellent reworkability" patented technology

This invention relates to a retardation film comprising: an A layer having a slow axis, and a B layer having a slow axis at an angle of 85° to 90° to the slow axis of the A layer; the A layer is formed of a resin A having positive intrinsic birefringence; the B layer is formed of a resin B having negative intrinsic birefringence; the resin B comprises polyester, polycarbonate, or polyester carbonate, wherein the polyester, polycarbonate, or polyester carbonate contains a fluorene framework; the overall in-plane retardation of the A layer and the overall in-plane retardation of the B layer satisfy a specific relationship; the in-plane retardations Re(450) and Re(550) of the retardation film at wavelengths of 450 nm and 550 nm satisfy a specific relationship; the overall thickness T of the A layer... A The overall thickness T of layer B B The ratio of T A / T B It ranges from 30 / 70 to 65 / 35.

The present application relates to the technical field of functional film, in particular to a functional film with controllable adhesive property and preparation method thereof.The functional film comprises a film substrate, a pressure-sensitive adhesive layer coated on the film substrate, and a release film layer temporarily attached to the pressure-sensitive adhesive layer.The functional film has the property of increasing adhesive property after ultraviolet irradiation, and the ratio of the peeling force F2 after ultraviolet irradiation to the peeling force F1 before ultraviolet irradiation is greater than 5.The current on the adhesive surface of the functional film prepared by the present application is 10-1000 pA, and the through current is 50-500 pA.Compared with the prior art, the functional film prepared by the present application has controllable current on the adhesive surface and through current, excellent electrical performance, avoids the problems of current accumulation in the adhesive layer, interference with signal transmission accuracy, and local overheating, and improves the application safety of the material.

The invention discloses an intrinsic flame-retardant recoverable thermosetting polymer foam material and a preparation method thereof, and belongs to the technical field of thermosetting polymers. The material is prepared by taking an epoxy resin monomer, a pre-curing agent, thermal decomposition type phosphate, a foam stabilizer, a nucleating agent and a catalyst as raw materials and adopting a two-step foaming process. At low temperature, the epoxy resin monomer and the pre-curing agent are pre-cured to form an initial cross-linked network so as to regulate and control the viscosity of the system. During high-temperature curing, the thermal decomposition type phosphate is decomposed to generate phosphoric acid and gas, and the gas serves as a foaming gas source; phosphorus hydroxyl groups of phosphoric acid react with epoxy groups to form dynamic phosphate ester bonds, and a dynamic covalent network is constructed. The thermal decomposition type phosphate has triple effects of a foaming agent, a dynamic cross-linking agent and an intrinsic flame retardant. The foam stabilizer and the nucleating agent regulate the pore size of the foam, the catalyst reduces the curing temperature and prevents internal carbonization of the foam, and the prepared material has recoverable and intrinsic flame retardant properties.

The embodiment of the utility model discloses a packaging structure of a soft package battery pack, and relates to the technical field of packaging, and the packaging structure comprises a supporting structure which comprises a cavity; wherein the cavity is used for containing the soft package battery pack, and under the condition that the soft package battery pack is placed in the cavity, the first end face of the soft package battery pack is opposite to the bottom face of the supporting structure; the at least one glue injection hole is formed in the side wall of the supporting structure so as to communicate the cavity with the outside; wherein the lower edge of the glue injection hole is located in a preset area of the side wall of the supporting structure, the preset area is an area limited by the orthographic projection of the first end face on the side wall and the orthographic projection of the plane where the interface of the sealing edge and the tab is located on the side wall, the sealing edge is arranged on the first end face, and the tab is arranged on the sealing edge; and the pouring sealant is filled in a gap between the plane where the lower edge of the glue injection hole is located and the bottom surface of the supporting structure through the at least one glue injection hole. The packaging structure of the soft package battery pack provided by the embodiment of the utility model can improve the waterproof performance.