High-Density Polyethylene in Package Construction

High-density polyethylene composition and molded articles with improved properties for applications like beverage container closures. The composition contains two types of polyethylene: an ethylene alpha olefin copolymer with specific melt flow and density ranges, and an ethylene homopolymer. The copolymer provides impact strength and the homopolymer provides rigidity. The weight ratio of the copolymer to homopolymer is 35-65:65-35. The composition is melt-kneaded to prepare the molded articles like bottle caps. The copolymer's low-temperature impact strength and environmental stress cracking resistance are improved compared to homopolymer-only compositions.

Source

Blend of high-density polyethylene (HDPE) resins with improved environmental stress crack resistance (ESCR) for injection, blow, and compression molding applications. The blend comprises a lower molecular weight multimodal HDPE component with density ≥ 940 kg/m3 and a higher molecular weight HDPE component. The lower molecular weight HDPE component has density ≥ 950 kg/m3 and an MFR of ≥ 50 g/10 min. The higher molecular weight HDPE component has density ≥ 950 kg/m3 and an MFR of ≤ 1.0 g/10 min. The blend provides ESCR ≥ 30 hours at 50°C and 6 MPa, which is higher than blends with only lower molecular weight HDPE.

Source

Packaging material with improved properties like durability, flexibility, brightness, and transparency compared to conventional packaging materials. The packaging material contains a unique composition of polymers like metallocene-based linear low density copolymer, low melting flow rate low density polyethylene, high density polyethylene, and high density polypropylene. This combination provides benefits like faster sealing, better load-bearing capacity, reduced deformation, enhanced strength, brighter appearance, and lower haze compared to conventional packaging materials.

Source

Polyethylene resin composition for heavy-duty packaging bags that provides improved low-temperature properties, such as drop bag strength, for bags used in cold areas. The composition has a specific melt flow rate, density, and tension range. It uses a blend of linear low-density polyethylene (LLDPE), linear medium/high-density polyethylene (LDPE/HDPE), and high-pressure low-density polyethylene (HLLDPE). The blend ratios are 40-70% LLDPE, 1-55% LDPE/HDPE, and 5-29% HLLDPE.

Source

A packaging material for photosensitive materials like photographic film that is strong enough to prevent breakage and puncture during handling without being laminated. The material is a single film made from a specific blend of polyethylene resins. It contains 5-30 wt% of high density polyethylene (HDPE) with high melt index (>0.5 g/10 min) and density (>0.950 g/cm³), 50 wt% of linear low density polyethylene (L-LDPE), and 0.1-20 wt% of a light-shielding material. The HDPE provides strength and resistance to sharp edges, while the L-LDPE balances properties. The light-shielding material blocks light.

Source