Solution dyed
December 7, 2021
Bi-component Monofilament Yarn
July 8, 2020
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    At Ri-Thai we put our environmental and social commitments into practice while continuously striving for company growth. As early as in 2011 we began to introduce the line of MonoGreen™ monofilaments made from the following materials in pursuit of environmental sustainability.

    These eco-friendly monofilaments facilitate the transition away from the “take, make, use and dispose” linear economy system to the circular economy system where the “reduce, reuse and recycle” closed loops are implemented.
    ●Circular economy system (click to know more)

    Ri-Thai’s Sustainable Development

    Sustainable Materials

    MonoGreenTM Products

    Production Optimization

    Solution Dyed

    • 80% water saving
    • Less chemicals and CO2 emissions
    • Lower energy consumption
    • Superior color fastness

    Recycled PET (rPET) Monofilament Yarn

    Today, the plastic waste issue and the global climate change are two of the most critical challenges the world needs to address.

    Due to greenhouse gases such as CO2 emitted from various human activities and the increasingly accumulated carbon emissions since industrial revolution, we are seeing more and more cases of extreme weathers. The United Nations has established 17 Sustainable Development Goals (SDGs) and expects to achieve most of these goals by 2030.

    More than one hundred nations have signed Paris Agreement and committed themselves to achieve the goal of Net Zero by 2050. With an increasingly global focus on sustainable development, "Net Zero" and "Carbon Neutral" initiatives have become international campaigns with the participation of several industrial leading brands such as Microsoft, Apple, Nike, as well as major automakers around the world.

    The carbon emissions generated from using “recycled” plastics, in comparison to “virgin” plastics, is significantly lower. In addition, using recycled materials will help you in reducing carbon tax.

    Through the following presentation, we would like to invite you to learn a little more about the global sustainable movements and our recycled PET (rPET) Monofilament Yarn at Ri-Thai.

    Ri-Thai rPET Monofilament Yarn

    Highest Standards For The Best Product

    Production Optimization 

    We use rPET chips from Far Eastern New Century,  the world’s second-largest producer of rPET, and other major chip suppliers in Taiwan.



    Our products meet the OEKO-TEX Standard 100, the highest standard for harmful RSL.

    The GRS (Global Recycled Standard) standard applies to products that contain 20% or more recycled content.

    At Ri-Thai, we believe 100% recycled content is the future for the market.

    Ri-Thai is GRS certified 90%-100% post-consumer recycled polyester monofilament yarn


    Virgin PET vs. rPET

    Physical Properties


    Heat Aging
    Tensile Retention


    CO2 emission /kg of fiber

    Virgin PET





    2.15 kg


    0.45 kg

    Source:ALPLA PET Recycling Team GmbH

    Higg Materials Sustainable Index (MSI)

    Environmental Impact of Products





    Fossil Fuel Based


    Recycled PET Flake


    Chemical (BHET) Recycled


    Mechanically Recycled


    Semi-Mechanically Recycled


    Ri-Thai's Circular Economy System

    Closing the "REUSE" Loop

    All color MonoGreen™ monoflaments are dope (solution) dyed, which leads to superior color fastness and less environmental impact in comparison with those by other dyeing methods. Furthermore, monoflament is by nature more durable and proved less prone to shed microfbers in the wash than staple fber and multiflament. When used in textiles, MonoGreen™ monoflaments enable better reusability and reduce microfber pollution in the oceans.

    Closing the "RECYCLE" Loop

    Despite being a less sustainable alternative than reuse, remanufacture or repair, recycling is an important and necessary component of a circular economy. This can be evidenced by the fact that an increasing number of recycled polymers are commercially available on the market.

    Closing the "CARBON" Loop

    “Anything that wears out or degrades during use belongs to the biosphere” says Prof. Dr. Michael Braungart, who developed the Cradle to Cradle® design concept in 1990s. In his concept, materials are returned to the biosphere in the form of compost or bio-degradable waste, from which new materials can be created.

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