Method for manufacturing crystalline resin sheets

By incorporating a molten nucleating agent and adjusting temperature and strain rate, the method produces crystalline resin sheets with high mechanical properties and transparency at reduced strain rates, addressing the limitations of conventional methods.

JP7841874B2Active Publication Date: 2026-04-07SUNALLOMER LTD +1
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-12-16
Publication Date
2026-04-07

AI Technical Summary

Technical Problem

Conventional methods for producing crystalline resin sheets with high mechanical properties and transparency require high tensile strain rates, limiting the flexibility of manufacturing conditions and increasing production complexity.

Method used

A method for producing crystalline resin sheets by rolling a molten resin composition between clamping rolls, incorporating a molten nucleating agent, and adjusting temperature and strain rate to reduce the tensile strain rate while maintaining high mechanical properties and transparency.

Benefits of technology

The method enables the production of crystalline resin sheets with NOC at lower strain rates, enhancing manufacturing flexibility and reducing production complexity without compromising mechanical strength and transparency.

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Patent Text Reader

Abstract

To provide a method for manufacturing a crystalline resin sheet containing NOC and having high mechanical properties and transparency while reducing an elongation strain rate from a conventional rate.SOLUTION: There is provided a method for manufacturing a crystalline resin sheet, in which a molten sheet-shaped crystalline resin composition is sandwiched between a pair of sandwiching rolls to roll thereof. The crystalline resin composition contains a crystalline resin and a melt-type nucleating agent, and when a radius of the pair of sandwiching rolls is R, an average thickness of the rolled sheet is L, and a sheet picking speed of the pair of sandwiching rolls is V, an average elongation strain rate ε (R, L, V) in a sheet elongation direction expressed by a specific equation is adjusted to be 1.0 s-1 to 30 s-1.SELECTED DRAWING: None
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Citation Information

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