Provided is a method for producing tetrafluoromethane through plasma pyrolysis of waste polytetrafluoroethylene (PTFE), relating to the technical field of waste recycling. The method of the disclosure includes: subjecting the waste PTFE to a plasma pyrolysis reaction to obtain a pyrolysis product, and subjecting the pyrolysis product to quenching and gas-solid separation in sequence to obtain a pyrolysis gas including the tetrafluoromethane, wherein the plasma pyrolysis reaction is performed at a temperature of 1,800 K to 5,000 K. The method provided by the disclosure has advantages such as a high conversion rate, a short reaction time, a large treatment capacity, high reaction safety, easy product purification, and suitable for continuous industrial scale-up, and can realize the recycling of waste PTFE with a low energy consumption and a low cost. In addition, the method of the disclosure avoids the fluorine waste caused by incineration and leads to a high value-added tetrafluoromethane product.

A closure for a product-retaining container is constructed for being inserted and securely retained in a portal-forming neck of said container. The closure comprises: a plastic material comprising at least one thermoplastic polymer; a plurality of particles comprising cork; and at least one processing aid. Optionally, one or more additives and/or blowing agents may be included. A method for manufacturing a closure comprises intimately combining multiple components, heating the resulting composition to form a melt, forming a closure precursor from the melt, and optionally cutting and/or finishing the closure precursor to form the closure.

Provided is a method for producing tetrafluoromethane through plasma pyrolysis of waste polytetrafluoroethylene (PTFE). The method includes: subjecting the waste PTFE to a plasma pyrolysis reaction to obtain a pyrolysis product, and subjecting the pyrolysis product to quenching and gas-solid separation in sequence to obtain a pyrolysis gas including the tetrafluoromethane, wherein the plasma pyrolysis reaction is performed at a temperature of 1,800 K to 5,000 K.

The disclosure relates to compositions including a constituent-A of a polylysine component, a XL-component, and a fibrous component of a fibrous element of vegetable fibers. The fibrous element is free of any fibers other than the vegetable fibers. The composition is free of any fibers other than the vegetable fibers of the fibrous component. The disclosure further relates to processes for obtaining an object from the compositions. The disclosure further relates to objects such as sheets, tapes, sticks, strips, films, cloths, containers, boards, panels, beams, frames, planks, engineered wood e.g. fibreboards obtained by said processes.

A resin composition contains a base resin containing a photopolymerizable compound and a photopolymerization initiator, and surface-modified silica particles, wherein the surface-modified silica particles have, as a silicone structural unit, a T unit in which three oxygen atoms are bonded to a silicon atom, and the proportion of a T1 unit contained in the T unit is 29 mol % or less.

A composite material includes a polymer matrix with a polymer having D-glucosamine monomer units and 50% or fewer N-acetyl-D-glucosamine monomer units. A salt can be disposed in the polymer matrix. A dispersed phase is disposed in the polymer matrix with the salt, and the dispersed phase and the polymer matrix form a porous composite foam. The porous composite foam includes, by weight, 0.5-3 times the dispersed phase to the polymer matrix, and the porous composite foam has a density of less than 1 g/cm.sup.3.

This biodegradable resin composition comprises a biodegradable resin, the biodegradable resin composition including one or more components selected from the group consisting of soybean-derived substances and wheat bran, wherein the biodegradable resin is a polybutylene adipate terephthalate.