9 results about "Stretch zone" patented technology

The present application belongs to the technical field of stretching machine variable track, and discloses a control method for full-automatic variable track of a stretching machine. For a synchronous stretching machine with the initial longitudinal stretching ratio as the maximum value, the stretching machine is divided into a forward chain track state and a return chain track state, the theoretical measurement values of the forward track gauge, the return track gauge, the outlet chain wheel disc offset and the return chain clamp quantity at different positions of the stretching zone corresponding to an arbitrary target longitudinal stretching ratio r are calculated, the motor is driven according to the above parameters, and the full-automatic variable track of the synchronous stretching machine is realized. When the automatic variable track is performed, the interval from r0 to r is subdivided into small intervals with an interval of 0.1; the motor is driven, the forward track gauge, the return track gauge and the outlet chain wheel disc offset are controlled to run to the target values in the small intervals in the same time, and the deviation between the theoretical measurement value N 测 of the return chain clamp quantity and the actual measurement value is within the permitted range, then the next small interval is continuously executed until the target value is reached.

An element for an incontinent device includes: a stretch laminate having a stretch zone having an elongation with a set of less than about 20%, at a tensile load of 10 N / inch, a dead zone having an elongation of at least about 20% lower than the elongation of the stretch zone, and a hook layer registered in the dead zone of the stretch laminate, and where: H1+H2≥H3, when the hook layer having a height H1, the stretch zone having a height H2, and the dead zone where the hook layer is registered having a height H3.

In one or more embodiments, a chemically strengthened glass article comprises a first main surface and an opposite second main surface defining the thickness t of the glass article, a stress profile σ(x) extending through the thickness t of the glass article, a first compressive stress layer extending to a first depth DOC1 greater than about 0.15t, a second compressive stress layer extending from the second main surface to a second compressive depth DOC2 less than or equal to DOC1, and a central tension zone positioned between the first and second compressive stress layers and including a peak tension PT and a tension zone width BTZ extending from DOC1 to t-DOC2. In embodiments, the following criteria apply: [1], where DOC = DOC1, [2] is the slope of the stress profile σ(x) at DOC, [3], and [4], where TA is the tension area defined by [5]. [Math 1] TIFF2026513507000280.tif54114

The invention discloses a method for improving the air permeability range of a wet-process diaphragm by using a synchronous drawing process, and relates to the technical field of battery diaphragm preparation, and the method comprises the following steps: S1, blending raw materials and extruding a cast sheet to obtain an oil sheet, and then carrying out longitudinal drawing treatment on the oil sheet to obtain a base membrane; s2, the sheet stretched in the step S1 is fed into a synchronous double-stretching drying oven to be subjected to longitudinal and transverse synchronous stretching, the synchronous double-stretching drying oven comprises a preheating area, a stretching area and a shaping area, and a thin film is obtained; s3, performing transverse stretching, extraction and secondary transverse stretching, rolling and slitting on the film subjected to two-way stretching in the step S2 to obtain a finished product diaphragm; according to the invention, synchronous two-way stretching is adopted to realize more symmetrical stress application on the molecular chain level, the lamellar crystal structure is induced to be more uniformly dispersed and arranged along the longitudinal and transverse directions, the finally formed micropores are mostly circular or quasi-circular, the inter-pore connectivity is good, the pore channel tortuosity is low, and the gas passing resistance is greatly reduced.

[Problem] To improve the cushioning properties of a stretchable structure in a worn state. [Solution] The problem is solved by a structure in which: wavy joint regions 80 following a front-rear direction LD are intermittently arranged in a width direction WD in a stretch area A2; joint parts 81 where a first sheet 12S and a second sheet 12H are fused are provided intermittently in the front-rear direction LD in a portion of each wavy joint region 80 that does not intersect an elastic member 15; a portion intersecting the elastic member 15 is a fixing portion 84 in which the elastic member 15 is fixed to the first sheet 12S and the second sheet 12H; an interval 90W between the adjacent joint parts 81 in the width direction WD is 7-14 mm; a dimension 80W of the joint part 81 in the width direction WD is 0.04-0.3 times the interval 90W; a total amplitude α of a side edge of the wavy joint region 80 is 0.2-0.7 times the interval 90W; and the maximum elongation rate of the stretch area A2 in the width direction WD is 200-240%.

This application provides a stretchable device and its manufacturing method, relating to the field of display technology, to reduce the risk of fracture of the bending strain layer during stretching. The stretchable device includes: a stretching region and a non-stretching region; a substrate; at least one bending strain layer located on one side of the substrate, covering the stretching region and the non-stretching region in a direction perpendicular to the plane of the substrate; wherein, the surface of the bending strain layer away from the substrate is the upper surface, and the surface closer to the substrate is the lower surface; the portion of the bending strain layer located in the stretching region is the stretching portion, the stretching portion including at least one stretching part, at least a portion of each stretching part having an arc-shaped bending shape, in the portion of the stretching part having an arc-shaped bending shape, the upper surface and the lower surface are concentric arcs, and the central angle corresponding to the arc of the upper surface is the same as the central angle corresponding to the arc of the lower surface.

The utility model belongs to the technical field of polyimide film stretching, and particularly relates to a transverse stretching device for a polyimide film, which comprises an operation panel, a heating area and a stretching area are sequentially arranged at the top of the operation panel, and a stretching table and a stretching piece are sequentially arranged in the stretching area from bottom to top. The stretching part comprises a rolling shaft of a V-shaped structure and pressing rollers rotationally installed at the two ends of the rolling shaft, the two pressing rollers are obliquely and outwards installed at the top of the stretching table in a rolling mode, the pressing rollers enable the polyimide film to be stretched outwards based on rolling, and an air groove for preventing the polyimide film from shrinking is further formed in the stretching table. According to the automatic stretching device, the stretching table, the two pressing rollers and the V-shaped rolling shaft are additionally arranged, when a polyimide film passes through the stretching table, the pressing rollers are driven to roll, and therefore the polyimide film is stretched outwards under the action of the V-shaped rolling shaft, and the automatic stretching function of the device is achieved.

The invention provides a stress release regulation and control method in the aluminum plate stretching process, and belongs to the technical field of aluminum plate production. Whether a partition stretching mode is started or not is judged according to a stress gradient coefficient, an aluminum plate is divided into independent stretching areas in the width direction, and differential initial stretching force is distributed for pre-stretching; when the residual stress release effect is insufficient, the material structure is stabilized through aging treatment, then the tensile force of each area is adjusted according to updated stress field data to conduct longitudinal stretching and transverse stretching, and in the stretching process, a temperature rise prediction control algorithm is adopted to dynamically adjust the cooling power to maintain the temperature field stable; surface layer and deep layer stress detection data are integrated to obtain a complete three-dimensional stress field, and it is judged that stress release regulation is completed. The technical problem that in the aluminum plate stretching process, due to uneven initial stress distribution, stress field redistribution after stretching is unbalanced, and high-precision stress uniformity regulation is difficult to achieve is solved.