摘要:
The present invention provides a thermal molding sheet having a thickness of 1 mm or more and formed by a polypropylene resin composition comprising: 5 to 97 wt % of a polypropylene resin (A) whose MFR and melt tension satisfy specific conditions and which has a long-chain branch structure; 1 to 93 wt % of a polypropylene resin (B) whose MFR satisfies specific conditions; 1 to 40 wt % of a thermoplastic elastomer (C); and 1 to 40 wt % of a filler (D).
摘要:
A styrene resin extruded foam includes a styrene resin, a flame retarder, a hydrofluoroolefin, an alcohol, and at least one selected from the group consisting of a saturated hydrocarbon having 3 to 5 carbon atoms, dimethyl ether, and alkyl chloride. An amount of the flame retarder is 0.5 to 8.0 parts by weight relative to 100 parts by weight of the styrene resin. The styrene resin extruded foam has an apparent density of 20 to 45 kg/m3 and a closed cell ratio of not less than 90%. An amount of the hydrofluoroolefin added is 65 to 90 mol % relative to 100 mol % in total of the hydrofluoroolefin and the alcohol which are added. An amount of the alcohol added is 10 to 35 mol % relative to 100 mol % in total of the hydrofluoroolefin and the alcohol which are added.
摘要:
A multi-layer sheet for forming an expanded foam container, the multi-layer sheet including a first layer of an expanded foam material including a first polyolefin-based material including at least one polypropylene-based polymer and a second layer of an unexpected material including a second polyolefin-based material including at least one polypropylene-based polymer that is co-extruded, extrusion coated, or laminated on a first side of the first layer.
摘要:
Disclosed herein is a foamable resin composition for a foam sheet including polylactic acid resin particles, each of the particles having a particle size of about 1 μm to about 100 μm. A process for preparing a particulate polylactic acid resin includes: introducing a polylactic acid resin and then forming a molten polylactic acid spray solution; and injecting the molten polylactic acid spray solution by a melt spray method and simultaneously cooling the molten polylactic acid spray solution to obtain a particulate polylactic acid. In addition, disclosed herein is a process for preparing a foam sheet using the foamable resin composition for a foam sheet including a polylactic acid resin.
摘要:
The present invention discloses a closed cell foam made of cross linked polyethylene and also discloses a method to produce the foam. The foam has an enhanced property of providing better thermal insulation and the same is achieved by incorporation of air gaps in the polyethylene foam.
摘要:
A seal for a vacuum lifter and method of manufacture wherein the seal has a continuous unbroken outer fluid resistant skin of elastomer which forms a boundary around a homogeneous cellular structure with no interior seams or joints.
摘要:
An improved rotary head extruder incorporates a twin auger system, in lieu of the typically used single auger, to create random extruded products having a density within the range of about 3.0 to about 6.0 lbs/cu ft. Extrusion using the rotary die system of a rotary head extruder together with the twin auger system allows for a wide variety of fine materials to be successfully introduced into and conveyed within a rotary head extruder to the die assembly, where the materials are cooked to form random extruded products. A transition piece at the downstream end of the augers allows for continuous, uniform flow to the die assembly, where cooking takes place. The extruded products incorporate formulations with various ingredients aside from the typically used corn meal formulations, having different tastes and nutritional benefits while maintaining the desired bulk density, texture, and crunch of random extruded products.
摘要:
Disclosed are plastic products from a recycled plastic mix of unidentified, unclean and unsorted mixed plastic waste made with a system comprising thermal and mechanical processing of the recycled plastic waste using continuous extrusion foaming, two-phase cooling, continuous metering of the pulling strength and automatic adjustment of the pulling speed and extrusion speed.
摘要:
The present invention provides a method for manufacturing an imitation wood and is featured by adjusting the temperature of a discharge outlet before or during conveyance of thermoplastic elastomers in a helical section of a screw extruder to be lower than the temperature of a tail end of the helical section, such that the viscosity of the thermoplastic elastomers in the discharge outlet increases and the flow velocity reduces at the outlet during the discharge process at the discharge outlet. Thus, the thermoplastic elastomers flow in a direction opposite to the discharge direction and rub, resulting in marks of back-flow and rubbing. During the process of back-flow and rubbing, the plastics will be pulled and break along the rubber elastomers and become filament-like, thereby generating filaments similar to wood. Then, the foaming blank material is squeezed out of the discharge outlet and is forced into a molding machine to proceed with planarity trimming, and the output material is cooled with a preset cold-bath tank of the molding machine, providing adjustment of different densities of imitation wood, such that the imitation wood produced by the present invention has high simulation of wood.
摘要:
Disclosed herein is a foamable resin composition for a foam sheet including polylactic acid resin particles, each of the particles having a particle size of about 1 μm to about 100 μm. A process for preparing a particulate polylactic acid resin includes: introducing a polylactic acid resin and then forming a molten polylactic acid spray solution; and injecting the molten polylactic acid spray solution by a melt spray method and simultaneously cooling the molten polylactic acid spray solution to obtain a particulate polylactic acid. In addition, disclosed herein is a process for preparing a foam sheet using the foamable resin composition for a foam sheet including a polylactic acid resin.