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Paper core

A paper core and elastic sleeve technology, applied in the field of paper core, can solve the problem of easy wrinkling of the film, and achieve the effects of improving product yield, simple processing operation and cost saving.

Active Publication Date: 2020-07-14
WUXI TAIJI PAPER IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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Embodiment Construction

[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 invention discloses a paper core, which is used for rolling and unreeling thin films. The paper core comprises a paper core bottom pipe and is characterized in that rubber with a round surface oran EVA elastic casing pipe wraps the exterior of the paper core bottom pipe. The Shore hardness C of the elastic casing pipe is 15-80 degrees. According to the paper core, the elastic casing pipe withthe Shore hardness C of 15-80 degrees wraps the exterior of the paper core bottom pipe, the elastic deformation of the elastic casing pipe neutralizes the fluctuation of tension, so that the fluctuation of tension is more stable, wrinkles of the surfaces of the rolled thin films are reduced, and the yield of products is increased. According to the thin films different in thickness and different kinds of rolling tension, the thickness of the elastic casting pipe is set, a small quantity of elastic materials can be used for achieving the effect of reducing the wrinkles of the surfaces of the thin films, and the cost is lowered. The paper core is easy and convenient to process and operate, and the elastic casing pipe is tightly combined with the paper core bottom 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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Application Information

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IPC IPC(8): B65H75/18
CPCB65H75/18B65H2701/5112
Inventor 尹美宗
Owner WUXI TAIJI PAPER IND