Abstract: This invention relates to polyester/plasticizer blends which are useful as heat-shrinkable films or sheet in low temperature shrink packaging applications. The plasticizer is injected into the melt of the polyester. The plasticizer lowers the glass transition temperature, on-set temperature and shrink rate of the polyester. Film or sheet produced by the polyester/plasticizer blends is clear.

Abstract: This invention relates to polyester/plasticizer blends which are useful as heat-shrinkable films or sheet in low temperature shrink packaging applications. The plasticizer is injected into the melt of the polyester. The plasticizer lowers the glass transition temperature, on-set temperature and shrink rate of the polyester. Film or sheet produced by the polyester/plasticizer blends is clear.

Abstract: This invention relates to a polymer blend comprising:(a) a concentrate comprising a polycarbonate resin, polycaprolactone and a copolyester having repeat units derived from terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol; and(b) a copolyester having repeat units derived from terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol.

Abstract: Disclosed is a polymer blend having excellent clarity and impact strength which is suitable for use in extrusion blow molding processes comprisinga) about 50-95 wt % of a polyester having repeat units from at least 95 mol % terephthalic acid, at least 90 mol % ethylene glycol and up to 10 mol % 1,4-cyclohexanedimethanol, the polyester having a weight average molecular weight of 75,000-85,000,b) about 40-4 wt % of recycled scrap polyester having repeat units from at least 90 mol % terephthalic acid and at least 90 mol % ethylene glycol and having a molecular weight of about 40,000-55,000, andc) about 1-10 wt % of a polymeric material containing at least 90 wt % polycarbonate and up to 10 wt % polyethylene terephthalate.

Abstract: Disclosed is glass fiber reinforced thermoplastic sheet material suitable for various compression molding applications. The glass fibers useful in this invention are described in detail, and the thermoplastic composition is poly(ethylene terephthalate), poly(cyclohexylene dimethylene terephthalate) or a blend of either of these polyesters with each other and/or polycarbonate.

Abstract: This invention concerns blends of poly(ethylene terephthalate), poly(ethylene naphthalate) and a compatibilizing amount of a copolyester which comprises (1) an acid component comprising repeating units of from about 10 to about 20 mole % terephthalic acid and about 80 to about 90 mole % naphthalenedicarboxylic acid, and (2) a glycol component comprising repeating units of ethylene glycol. Clear containers containing less than 10% haze produced from such blends are useful for a variety of packaging applications, particularly hot-fill food and beverage containers where good barrier and clarity are needed.

Abstract: A clear polymer blend comprising:(1) 50-90 wt. % of a glycol copolyester having repeat units from 1,4-cyclohexanedimethanol, terephthalic acid and an alkylene glycol;(2) 45-5 wt. % of a polycarbonate resin; and(3) 5-45 wt. % of an aromatic polyester having repeat units from terephthalic acid, isophthalic acid and Bisphenol A.

Abstract: A glass fiber reinforced poly(ethylene terephthalate) resin, comprising:(i) a poly(ethylene terephthalate) resin;(ii) 10to 60 weight % of reinforced glass fibers; and(iii) 0.1 to 10 weight % of a nucleating agent comprising:(a) a Group I, II, or IV metal cation salt of an ethylene/methacrylic acid copolymer resin having a melt flow index of from about 0.5 g/10 minutes to about 150 g/10 minutes measured at 190.degree. C. under a 10,128-gram load, and(b) a Group I, II, or IV metal cation salt of an ethylene/acrylic acid copolymer resin having a melt flow index of from about 0.5 g/10 minutes to about 150 g/10 minutes measured at 190.degree. C. under a 2,160-gram load.

Abstract: Disclosed are reinforced polyester molding compositions comprising poly(ethylene terephthalate), glass fibers, at least one sodium or potassium salt of a hydrocarbon carboxylic acid or an ionic hydrocarbon copolymer of an .alpha.-olefin, an .alpha.,.beta.-ethylenically unsaturated carboxylic acid and a primary linear polymeric alcohol having the structure CH.sub.3 (CH.sub.2).sub.x CH.sub.2 OH where x has an average value of 28-48.

Abstract: Disclosed are polyester blends and articles produced therefrom, wherein the blends contain copolyester material comprising one or a mixture of copolyesters such as that prepared from ethylene glycol and 1,4-cyclohexanedimethanol in certain molar proportions with terephthalic acid, blended in certain proportions with poly(ethylene isophthalate). Formed amorphous articles such as bottles, films and sheets of these blends unexpectedly are clear and show marked reduction in carbon dioxide permeability, e.g., about 20-40% lower than predicted, and have good oxygen and water vapor barrier properties. The blends are especially useful in food packaging applications such as carbonated drink bottles, where good gas and water vapor barrier properties are highly desirable.

Abstract: Disclosed are polyester compositions having special utility in film or sheet form having improved gas and water barrier properties, and comprising homo- or copolyesters derived from terephthalic acid or mixtures of terephthalic acid with acids such as isophthalic, 2,6-naphthalene dicarboxylic, and the like, and a glycol component such as ethylene glycol or 1,4-cyclohexanedimethanol, blended with from about 1 to about 30 weight % of certain bisphenols such as bisphenol-A, and naphthalene diols. Films or sheets of these compositions are characterized by having greatly reduced oxygen, carbon dioxide and water vapor permeabilities.

Abstract: Blended composition of cellulose ester and a copolyacrylate having improved notched Izod impact strength and excellent visual clarity; the cellulose ester being selected from cellulose acetate butyrate and cellulose acetate propionate; and the copolyacrylate including about 5 to about 20 parts per hundred parts resin of a copolymer containing about 45 to about 55% by weight butyl acrylate and about 55 to about 45% by weight methyl acrylate.

Abstract: A composition comprised of an admixture of a sodium salt of a monocarboxylic acid and known polyetheresters can be molded into articles having a combination of unobvious compression recovery after deformation and unobvious clearness.