摘要:
The instant disclosure provides a die assembly for producing microcapillary film. The die assembly is operatively connectable to an extruder having a thermoplastic material passing therethrough. The die assembly includes a pair of die plates, a manifold, and a plurality of nozzles. The manifold is positionable between the pair of die plates and defining a plurality of film channels therebetween. The plurality of film channels converge into an elongate outlet. The thermoplastic material is extrudable through the plurality of film channels and the elongate outlet to form a multi-layer film. The plurality of nozzles are positionable between the plurality of film channels. The plurality of nozzles are operatively connectable to a source of channel fluid for emitting the channel fluid into the thermoplastic materials exiting the die whereby microcapillaries are formed.
摘要:
This invention describes a foamed material wherein the foam is characterized by elongated cells, which have an aspect ratio larger than 1.5, and by a density according to ISO 845 of lower than 150 kg/m 3 , preferably lower than 80 kg/m 3 and a process of manufacturing said material with very good thermal insulation properties. The thermal conductivity is decreased from typical 0.035 W/mK down to 0.025 W/mK by combination of cellular orientation and cell size distribution. In order to be able to achieve necessary cellular orientation level, the melt strength of the polyester resin was significantly increased by reactive extrusion and subsequent foaming, and the extrusion tooling and processing conditions were optimized.
摘要翻译:本发明描述了一种发泡材料,其中泡沫体的特征在于长宽比大于1.5的细长细胞,以及根据ISO 845的密度低于150kg / m 3,优选低于80kg / m 3的泡沫材料, 制造具有非常好的绝热性能的材料的方法。 通过细胞取向和细胞大小分布的组合,热导率从典型的0.035W / mK降低到0.025W / mK。 为了能够实现必需的细胞取向水平,通过反应性挤出和随后的发泡,聚酯树脂的熔体强度显着增加,并优化了挤出加工和加工条件。
摘要:
A heat insulator that generates no smoke when incinerated, has a low calorific value, and achieves a desired dimension and heat insulation performance is provided. A heat insulator 1 is formed by heat-mixing, in an extruder 11, a paper pellet 7 that is a mixture of a fine paper powder having a particle diameter of 30 to 200 µm and starch, a container recycle pellet 8 that is a mixture of polypropylene, polyethylene, and polystyrene, foamable polypropylene 9, and water 10 to obtain a plate-like foamed product 2, and orthogonally overlaying a plurality of plate-like foamed products 2. A weight distribution is set so that the paper pellet 7 is 50 to 65% by weight, the container recycle pellet 8 is 13 to 25% by weight, the foamable polypropylene 9 is 10 to 30% by weight, and the water 10 is 10 to 20% by weight to these resins and other materials.
摘要:
A heat insulator that generates no smoke when incinerated, has a low calorific value, and achieves a desired dimension and heat insulation performance is provided. A heat insulator (1) is formed by heat-mixing, in an extruder (11), a paper pellet (7) that is a mixture of a fine paper powder having a particle diameter of 30 to 200 µm and starch, a container recycle pellet (8) that is a mixture of polypropylene, polyethylene, and polystyrene, foamable polypropylene (9), and water (10) to obtain a plate-like foamed product (2), and orthogonally overlaying a plurality of plate-like foamed products (2). A weight distribution is set so that the paper pellet (7) is 50 to 65% by weight, the container recycle pellet (8) is 15 to 25% by weight, the foamable polypropylene (9) is 10 to 30% by weight, and the water (10) is 10 to 20% by weight to these resins and other materials.
摘要:
The present invention is a process for producing a thermosetting resin foamed plate, comprising a step of discharging a resin composition obtained by mixing at least a thermosetting resin, a foaming agent and a curing agent onto a surface material and foaming and curing the resin composition, wherein the resin composition is supplied into a die from a plurality of inlets of the die by a plurality of branched channels to reside, and the resin composition is discharged from a die lip outlet onto the surface material into a plate form.
摘要:
The extruded propylene-based resin foam according to the present invention is extruded propylene-based resin foam that is formed by extrusion-foaming a propylene-based resin, and the extruded propylene-based resin foam has the expansion ratio of 10 or more and the average cell diameter of less than 400 µm. In addition, the extruded foam contains a 60 or less wt% fibrous filler in relation to the whole molding material. With this configuration, the extruded foam can have a plurality of foam cell walls therein. Thus, the extruded foam can efficiently block external radiant heat, thereby realizing excellent insulation efficiency. Furthermore, because the fibrous filler is oriented along the thickness direction, even when the extruded foam is slightly strained in the thickness direction, a high stress arises, thereby improving energy-absorbing capability.
摘要:
The present invention relates to a method which comprises the steps of continuously extruding microcellular polymeric material having cells of essentially uniform size of less than about 50 microns average size from a single-phase solution of polymeric material and blowing agent contained in extrusion apparatus (30) including a nucleating pathway (66), the blowing agent present in the solution in an amount less than about 80 percent saturation concentration as determined at the lowest pressure in the system after the point of blowing agent injection (54) prior to the nucleating pathway (66).