The most popular American recycler developed the s

2022-08-07
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American recyclers have developed a new near-infrared technology for separating PLA from pet.

as more and more enterprises begin to use biological plastic bottles made of polylactic acid, some recycling enterprises are worried that these polylactic acid bottles may pollute the pet regeneration stream. However, according to a large-scale test recently released, near infrared technology (NIR) can effectively separate PLA and pet

these test results were submitted to plastics on June 30 by NatureWorks LLC, a bioplastic manufacturer, and primo water Corp., a company engaged in filling PLA bottles. The results showed that the PET sheet made of the tested recycled resin was not contaminated

however, renewable enterprises are still worried. Some recyclers said that these tests were not conducted under actual operating conditions, and the number of PLA bottles sorted out during the tests was not enough. In reality, PLA bottles may still further reduce the shrinking output of regenerators and reduce the efficiency of their pet regeneration process

Steve Alexander, executive director of the association of post consumer plastic recyclers in Washington, D.C., said: "I am not sure whether the results of these tests have answered all the questions of the recyclers about the regeneration of PLA and its possible pollution of pet. 3. after years of practical use and inspection, the pendulum is placed on the edge of the support with a wooden block, and the notch of the impact specimen is at the center of the support span with a notch centering template."

he said: "at present, the regeneration industry uses many different kinds of technologies, and the testing party only uses the near-infrared technology for all tests, but not all regeneration enterprises use this technology."

many pet recyclers use the vinyl cycle detection system produced by National Recovery Technologies Inc. in Nashville, Tennessee, rather than the NIR technology. The price of NIR system is as high as USD 200000, which is generally only used by large-scale material recycling plants and waste transporters

these tests were commissioned by NatureWorks and primo and verified by the independent consulting firm plastics forming enterprises LLC (PFE). The test equipment they used was a NIR machine produced by Titech visionsport GmbH in Oslo, Norway

the test flattened about 75 pounds - that is, 1500 PLA bottles made by primo water without caps or labels, and added them to PET bottles weighing about 35000 pounds. Considering that primo ranks fourth in the water bottle market, this test capacity is selected

brian glasbrenner, director of beverage, film and card business in the Americas of NatureWorks, said that most of these tests were conducted earlier this year. The test found that 93% of PLA was separated, and between the sheet samples produced by a control master batch made of recycled PET resin and the two sheet samples containing PLA not separated in the process of sorting the localization of innovative products, There is no "significant difference in color or haze"

gla, especially the uneven distribution, sbrenner said: "I am full of confidence in these tests, which will encourage a large group of people who were originally neutral or opposed to us to support our position. This is not a laboratory test or periodic test, but a test conducted in a large-scale commercial factory in normal operation. Our tests are very fair, very practical, very robust and reliable. The number of bottles we test is also reasonable, and we also ask a third party to verify the results Tested. "

however, several recycling enterprises raised objections

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