Recycled polyester

First developed in a lab in the 1940s, polyester is one of the world s most widely used fibres. But unfortunately, polyester is made from anon-renewable resources. That s why we ve been using recycled polyester for some years now. They main source of recycled polyester is PET plastic bottles and waste raw material left over from production. Independent third party certifieation follows the Global Recycling Standard (GRS). 

Recycled Polyamide is a synthetic fiber based on polymer waste recovery. The waste material can either come from post consumer stream - such as fishing nets, carpets or used apparel - or from post industrial stream i.e., waste occurring during production - such as polymer, fiber waste during yam 

Beeause of technieal limitation, recycled polyamide is not alw s 100% recyeled yams are available from 50 to 100% recycled content. Both recycled nylon 6 and reeycled nylon 6.6 are available on the market. 

Recycled polyamide is ideal for jersey, used when making underwear and woven fabrics. It is made from textile production waste as well as fishing nets or carpets. Independent third party certification follows the Global Recycling Standard (GRS). 

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Research was conducted on the method of recycling polyurethane, formulation of recycled polyurethane-modified recycled polyester (RPUMRPE) and their mechanical and chemical resistance properties. 

This process can achieve a recovery of scrap foam into a polyol mixture, which can be used to produce polyurethane without the need for purification. This method requires low capital investment and is simple enough to cope with variations in the mix scrap foam. The resulting recycled polyol can be incorporated with polyisocyanate to produce recycled polyurethane which can be used to modify recycled polyester mortar made with either virgin or recycled resins. 

In this work, polyurethane was made from recycled polyol obtained from rigid foam and polyisocyanate. The raw material for the polyester resin was recovered from scrap PET [5], then depolymerized using different amounts of ethylene, propylene glycol into glycolized monomer and oligomer. These glycolized products were reacted with maleic or terephthalic acid to obtained recycled polyester. The proportion of recycled polyurethane to recycled polyester was varied ranging from 1 1, 1 2, 1 2.5, and 0 1. The combined resins were then mixed with initiator,... 

This tensile strength was measured using dog bone specimens with a 1 in.xl in. (25 mm><25 mm) crosssection. The results of Table 1 show that RPUMRPE mortar exhibits an excellent tensile strength of about 1700 psi (11.72 MPa) after 7 days when the ratio (RPU RPE) ranges from 1 2 to 1 2.5. It can be seen that recycled polyurethane improves the tensile strength of the recycled polyester. 

Typical properties of RPUMRPE mortar in comparison to the hybrid recycled polyester (HRPE) mortar and recycled polyester (RPE) are presented in Table 6. The HRPE is hybrid polymer of recycled polyester and polyurethane which comes from F2 hybrid resin part A made by Amoco. The RPE is recycled polyester made by Alpha corporation. The bond, tensile and compressive strength, modulus of elasticity and shrinkage of these three kinds of polymer mortar were measured at 4, 8, 12, and 24 hours respectively. 

Several overlays from 0.5 to 1.0 inch (12 to 25 mm) in thickness were cast on beams from 16 to 65 inches (406 to 1650 mm) long for each polymer mortar. Three polymers mortars, RPUMRPE, HRPE, and RPE, were tested. They were demolded after one day, and it was found that RPUMRPE and HRPE overlays showed no delamination, but the recycled polyester (RPE) developed a 0.5-1-mm crack at the interface of the overlay and beam. After 3 months, the RPE overlay separated from the beam. In contrast, the RPUMRPE and HRPE overlays performed well. Two... 

Polyester fibers with improved properties are prepared from blends of PET with PEN, or a blend of PET with a copolymer having terephthal-ate and naphthalate units. In addition, recycled PET can be used, thus providing a valuable use for recycled polyester materials. 

Breathable membrane producer Sympatex has also established a maximum ecology and sustainability approach in developing its product, Phaseable. It contains environmental friendly 100% solvent-free foam print and coating as well as recycled polyester face fabric. 

Nikes s sustainability strategy is to create a portfolio of sustainable materials materials account for around 60% of the environmental impacts of the average Nike shoe. Thus, using less or recycling more could make a big difference. Last year, for example, Nike used 7 million kg of organic cotton and included recycled polyester in more than 31 million products. 

Early adoption of recycled polyester in outdoor sports clothing... 

In 1993, collaboration between Patagonia and Malden Mills (now Polartec) led to the early development of recycled polyester fibre (from Wellman Inc.) for use in Synchilla fleece made from plastic soda bottles that diverted waste from landfills. Later, PCR filament yam was made for linings and shell fabrics from 30% to 50% post-consumer materials (bottles, polyester uniforms, tents and garments) with the remainder sourced from post-industrial waste. Clothes, at end of life, if constituted from one fibre type, can be recyclable. In theory, consumers may return a polyester garment to be forwarded to a processor to be re-made into fibre or downgraded to other forms of plastic. 

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