a paper core
A paper core and elastic sleeve technology, applied in the paper core field, can solve the problem of easy wrinkling of the film, and achieve the effect of improving product yield, tight bonding and reducing wrinkling on the surface of the film
Active Publication Date: 2022-01-28
WUXI TAIJI PAPER IND
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Problems solved by technology
[0004] The purpose of the present invention is to provide a paper core capable of reducing film wrinkling and its paper core technology in view of the defect that the prior art film is easily wrinkled during the winding process.
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[0021] Such as Figure 1-5 As shown, a paper core is used for film unwinding and rewinding, including a paper core bottom tube 2, and the outside of the paper core bottom tube 2 is covered with an elastic sleeve 1 made of rubber or EVA with a smooth surface. The elastic sleeve 1 has a Shore C hardness of 15-80 degrees. The inner diameter of the paper core bottom tube 2 is 76-203 mm, and the thickness is 3-25 mm; the thickness of the elastic sleeve 1 is 0.5-10 mm.
[0022] Preferably: the Shore hardness C of the elastic sleeve 1 is 30-70 degrees. When the thickness of the film is ≤16μm, the thickness of the elastic sleeve is ≤9mm.
[0023] The causes of film winding wrinkles include the fluctuation of winding tension, the influence of film thickness and width, and the influence of flatness and stiffness of paper core, etc. The essence of tension is the elastic elongation of the film caused by the increase of winding speed. The greater the tension, the more uneven its distrib...
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Abstract
The present invention discloses a paper core for the film closure, including the paper core pipe; it is characterized by: the outer surface of the paper core tube is covered with round rubber or EVA elastic tube;The hardness C of the tube is 15邵80 degrees.The invention is an elastic casing with a hardness C of Shaw's hardness C in the outside of the paper core tube. The elasticity of the elastic sleeves offsets the fluctuations of the tension through the elastic formal changes of the elastic sleeve, making the tension fluctuations more smoothly, reducing the surface of the film to collect the film on the surface of the film.Wrinkles, improve product yields.According to the thin film of different thickness and different volume tension, setting the thickness of the elastic sleeve can achieve the effect of reducing the wrinkle of the film on the surface of the film with less elastic materials, saving costs.The paper core processing of the present invention is easy to process, and the elastic sleeve is closely bonded with the paper core pipe.
Description
technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a paper core used for film winding and unwinding and effectively reducing film wrinkling. Background technique [0002] Paper cores are often used for film rewinding and unwinding. During the film winding process, there will be film wrinkling, which will reduce the product yield. The causes of winding wrinkles include the fluctuation of winding tension, the influence of film thickness and width, and the influence of flatness and rigidity of paper core, etc. The essence of tension is the elastic elongation of the film caused by the increase of winding speed. The greater the tension, the more uneven its distribution in the transverse direction, the worse the flatness, and the easier it is to wrinkle; but the tension should not be too small, otherwise the film roll will be too large. Looseness causes slitting and stringing and affects product quality. The thicker ...
Claims
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IPC IPC(8): B65H75/18
CPCB65H75/18B65H2701/5112
Inventor 尹美宗
Owner WUXI TAIJI PAPER IND