Patterned Colouring via Variable-Speed Single Stretching

Wu, Xuelian; Tiwari, Vishwa Mohan; Suryarao, Kimaya Prasad; Tan, Richard B.; Lv, Haibao; Zhang, Yilei; Wang, Zhifeng; Huang, Wei Min

doi:10.3390/inventions7040093

Inventions

2022

DOI: 10.3390/inventions7040093

|View full text |Cite

Patterned Colouring via Variable-Speed Single Stretching

Xuelian Wu

Vishwa Mohan Tiwari

Kimaya Prasad Suryarao

et al.

Abstract: We demonstrate a cost-effective, highly reliable/stable and environmentally friendly approach for the patterned colouring of a commercial transparent polyethylene terephthalate (PET). We show that different colour patterns (transparent, white/translucent, complete white/silver and different combinations of these three colours) can be realised in PET strips upon varying the speed during continuous stretching. The conditions for good quality colour patterns are investigated, and the length of transient region du… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2023

2024

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

References 13 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

Revisiting stress-oscillation in cold drawing of poly(ethylene terephthalate)

Heeley,

Smith,

Wan

et al. 2023

Polymer

View full text Add to dashboard Cite

Revisiting stress-oscillation in cold drawing of poly(ethylene terephthalate)

Heeley,

Smith,

Wan

et al. 2023

Polymer

View full text Add to dashboard Cite

Highlighting Free-Recovery and Work-Generating Shape Memory Effects at 80r-PET Thermoformed Cups

Sava,

Pricop,

Popa

et al. 2024

Polymers

View full text Add to dashboard Cite

The paper starts by describing the manufacturing process of cups thermoformed from extruded foils of 80% recycled PET (80r-PET), which comprises heating, hot deep drawing and cooling. The 80r-PET foils were heated up to 120 °C, at heating rates of the order of hundreds °C/min, and deep drawn with multiple punchers, having a depth-to-width ratio exceeding 1:1. After puncher-assisted deformation, the cups were air blown away from the punchers, thus being “frozen” in the deformed state. Due to the high cooling rate, most of the polymer’s structure reached a rigid, glassy state, the internal stresses that tended to recover the flat undeformed state were blocked and the polymer remained in a temporary cup form. When heating was applied, glass transition occurred, and the polymer reached a rubbery state and softened. This softening process released the blocked internal stresses and the polymer tended to recover its flat permanent shape. This relative volume contraction quantitatively describes the shape memory effect (SME) which can be obtained either with free recovery (FR-SME) or with work generation (WG-SME) when the cups lifted their bottoms with different loads placed inside them. The paper discusses the results obtained by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), room-temperature tensile failure tests (TENS) and scanning electron microscopy (SEM). The DSC charts emphasized a glass transition, responsible for SME occurrence. The DMA thermograms and the TENS curves revealed that there are slight differences between the storage modulus and the tensile strains of the specimens cut on longitudinal, transversal, or 45° to the film rolling direction. The SEM micrographs enabled to observe structural differences between the specimens cut parallelly and transversally to the film’s rolling direction. The thermoformed cups were heated on a special experimental setup, which enabled the determination of FR-SME and WG-SME after applying different maximum temperatures and loads placed into the cups, respectively.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Patterned Colouring via Variable-Speed Single Stretching

Cited by 2 publications

References 13 publications

Revisiting stress-oscillation in cold drawing of poly(ethylene terephthalate)

Revisiting stress-oscillation in cold drawing of poly(ethylene terephthalate)

Highlighting Free-Recovery and Work-Generating Shape Memory Effects at 80r-PET Thermoformed Cups

Contact Info

Product

Resources

About