The Plastics 2020 Challenge, along with PlasticsEurope, has condemned the anti-bag campaigners in Northern Ireland for what they claim are frightening tactics.
Plastics 2020 Challenge includes the British Plastics Federation, Britain's Packaging and Films Association and PlasticsEurope.
The anti-bag activists are pushing the global issue of marine litter to divert attention from the resource efficiency properties of plastic carrier bags, said their opponents.
PlasticsEurope said a bag levy is not a solution to poor waste management, a lack of waste bins and irresponsible behavior.
Suggesting marine wildlife is under global threat from plastic carrier bags is a PR move, according to Packaging and Films Association (PAFA).
British Plastics Federation public and industrial affairs director Philip Law said plastic bags are better than alternatives from a functional, environmental and hygienic point of view.
"Authoritative and independent studies back this up," Law added.
