The present invention relates to a polyvinylidene chloride (PVDC)-based composite and a method for preparing the same. The PVDC-based composite includes a core including a PVDC-based polymer; and a shell surrounding the core and including wax. The wax is nano-sized particles.

This invention relates to a method for the production of a co-extruded plasticized multi-layer PVC packaging film that consists of polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), a combination that consists of polyvinyl chloride (PVC) and polyvinylidene chloride (PVDC) or other thermoplastics or elastomers that can be co-polymerized with PVC, having a plasticizer migration behavior from the film composite, which is reduced compared to comparable mono-layer plasticized PVC films and is maximally restricted to 40 mg/dm.sup.2. The invention also relates to a co-extruded plasticized multi-layer PVC packaging film that consists of polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), a combination that consists of polyvinyl chloride (PVC) and polyvinylidene chloride (PVDC) or other thermoplastics or elastomers that can be co-polymerized with PVC, having a plasticizer migration behavior from the film composite, which is reduced compared to comparable plasticized mono-layer PVC films and is maximally restricted to 40 mg/dm.sup.2.

Provided are a laminated structure having a composition coping with environmental problems and having an excellent gas barrier property and oil resistance, a food packaging container formed by using the laminated structure, and a method for producing the laminated structure. The laminated structure includes a second coating layer including a polyvinylidene chloride-based resin through a first coating layer formed by blending clay in a proportion of 35% by mass or more and 65% by mass or less and light calcium carbonate in a proportion of 5% by mass or more and 30% by mass or less in a continuous phase made of an acrylic polymer on one surface or both surfaces of a substrate including a thermoplastic resin and an inorganic substance powder in a mass ratio of 50:50 to 10:90.

The invention pertains to an improved PVDC composition including certain dienophiles qualified for food contact, which possess an optimized balance of effectiveness in preventing discoloration upon exposure to radiation, with no negative impact on the barrier properties, in particular sorbate esters of formula (I), wherein R.sub.1 is a C.sub.1-C.sub.12 hydrocarbon group, preferably a C.sub.1-C.sub.6 alkyl group, to layers made therefrom, to multi-layer assemblies comprising the same, and to the use of said assemblies for packaging, in particular for packaging foodstuffs. ##STR00001##

A single-layer or multilayer film formed from one or more polymeric materials has CIE colour values a* and b* such that −7≤a*≤0, −15≤b*≤0 and an optical transmission T such that 60%≤T≤95%. The inventive, transparent films provide discoloration compensation that alleviates yellowing caused by UV light.

A composition and method for microbial control on a material surface using a minimum risk pesticide such as a GRAS antimicrobial/preservative component. The GRAS antimicrobial/preservative component is preferably an organic acid.

A composition for odor reduction and bacterial control on a textile material is provided. The composition has a GRAS antimicrobial/preservative additive. The composition may contain an essential oil. The GRAS antimicrobial/preservative additive can be a minimum risk pesticide. The composition may have a carrier. A method of using the composition and an article treated with the composition are also provided.

A method of forming a polymeric vacuum insulation board is provided, the polymeric vacuum insulation board including a plurality of evacuated, closed-cell pores therein. In one embodiment, the method includes intermixing a polymer with zeolite particles that contain water and extruding the resulting composition under high pressure. During extrusion, water in the zeolite particles evaporates and creates a porous, closed-cell microstructure within a polymer matrix. As the polymer matrix cools and solidifies, water vapor is reabsorbed by the zeolite, which at least partially evacuates the closed-cell pores. In another embodiment, the method includes intermixing a polymer with expandable graphite particles and extruding the resulting composition under high pressure. During extrusion, the expandable graphite particles define evacuated voids. The polymer binder can be selected to include low gas permeance, for example ethylene vinyl alcohol (EvOH) or polyvinylidene chloride (PVDC). In some applications, the polymer can be blended with nano-clays or other additives to further decrease the gas permeance of the vacuum insulation board.

A single-layer or multilayer film formed from one or more polymeric materials has CIE colour values a* and b* such that 7a*0, 15b*0 and an optical transmission T such that 60%T95%. The inventive transparent films provide discoloration compensation that alleviates yellowing caused by UV light.

The present disclosure discloses a polymer-based nanocomposite and an optical filter based thereon, wherein components of the polymer-based nanocomposite have a polymer matrix and a semiconductor material; and the polymer-based nanocomposite has an average light transmittance of greater than 90% in at least one light-transmitting wavelength range and a light transmittance of less than 1% in at least one cut-off wavelength range, wherein the semiconductor material is a non-radiative recombination-type perovskite material.