摘要:
TFE와 1종 이상의 관능성 공단량체의 중합체이며, 중합체 사슬에 펜던트한 관능기를 갖는 공중합체로 된 관능성 TFE 공중합체 미세 분말이 기재되어 있다. 관능성 TFE 공중합체 미세 분말 수지는 페이스트 압출될 수 있고, 팽창될 수 있다. 관능성 TFE 공중합체를 제조하는 방법이 또한 기재되어 있다. 팽창된 관능성 TFE 공중합체 물질은 팽창 후에 후-반응될 수 있다.
摘要:
PURPOSE: An expanded cellular material is provided to obtain a low density polyester foam material with a good cellular structure in stable processing conditions. CONSTITUTION: In an expanded, cellular material comprising at least 50 wt% of post-consumer polyester resin, the intrinsic viscosity of the polymer(s) is upgraded during the foam extrusion process and the intrinsic viscosity of the exiting foam is characterized by being higher than 1.2 ml/g, preferably above 1.35 ml/g and the density is between 40 and 200 kg/m^3, preferably between 50 and 150 kg/m^3.
摘要翻译:目的:提供膨胀的多孔材料,以获得在稳定的加工条件下具有良好的细胞结构的低密度聚酯泡沫材料。 构成:在包含至少50重量%的消费后聚酯树脂的膨胀的多孔材料中,聚合物的特性粘度在泡沫挤出过程中升高,并且出口泡沫的特性粘度的特征在于更高 优选高于1.2ml / g,优选高于1.35ml / g,密度在40至200kg / m 3之间,优选在50至150kg / m 3之间。
摘要:
본 발명의 발포성 수지 조성물은 전분, 합성 수지, 알칼리성 화합물 및 해당 전분 100 질량부에 대해 10질량부∼40질량부의 물을 함유하는 발포성 수지 조성물로서, 해당 합성 수지의 함유량이, 0.02질량%∼10질량%인 것을 특징으로 한다. 알칼리성 화합물로서는 알칼리 금속의 탄산 수소염, 알칼리 금속의 탄산염, 알칼리 토류 금속의 탄산 수소염 및 알칼리 토류 금속의 탄산염으로 이루어지는 군에서 선택되는 적어도 1종인 것이 바람직하다. 본 발명의 발포성 수지 조성물을 이용하여 얻어지는 발포체의 완충 성능 등은 실용상 문제가 없고, 합성 수지의 함유량이 극히 적으므로 비용적으로 유리하다.
摘要:
본 발명은 a) 용융 열가소성 중합체에 발포제를 첨가하는 단계, b) 발포제를 포함하는 용융 중합체를, 노즐에 의해 냉각 및 압출시키는 단계, 및 c) 감압 하에 노즐의 후미에서, 물 및 가용화제를 포함하는 발포제를 포함하는 용융 중합체를 절단하고, 발포 입자를 발포시키는 단계를 포함하는, 열가소성 중합체로부터 저 벌크 밀도 발포 입자를 제조하는 방법 및 이 방법에 따라 수득되는 발포 입자(비드)에 관한 것이다. 발포 비드, 벌크 밀도, 열가소성 중합체, 발포제, 가용화제
摘要:
A foam composition is provided to form a homogeneous polymer foaming structure, to offer good dielectric properties for the improvement of electrical conductivity in the cable field, and to minimize the amount of expensive fluorinated polymer. A foam composition includes a polymer having a melting point of 250 °C or higher, and an organic salt which is a chemical foaming agent having a decomposition temperature higher than the melting point of the polymer. The organic salt is selected from the group comprising citrate derivatives, stannate derivatives, or mixtures thereof. The polymer is a fluorinated polymer. The foam composition further contains a cohesive agent. The cohesive agent is contained in an amount of 0.2-2wt% of the composition.
摘要:
The present invention generally relates to methods for preparing extruded foam products and more particularly to a methods for producing such products with a blowing agent containing 134a and an alcohol.
摘要:
Foam a polymer blend of (a) a high melt strength polypropylene (HMS PP) ; (b) a linear or substantially linear polypropylene that has a melting point within ten degrees Celsius of (a), a melt flow rate that is significantly different than (a) and that is miscible with (a); and, optionally, (c) a polyethylene that is immiscible with (a) produces a polymeric foam having an average cell size of at least four millimeters and that has an inherent open-celled content of at least 40 percent. The HMS PP makes up 60 weight percent (wt%) or more and 90 wt% or less of the total combined weight of (a) and (b). Component (c) makes up 60 wt% or less of the total polymer blend weight.
摘要翻译:泡沫(a)高熔体强度聚丙烯(HMS PP)的聚合物共混物; (b)具有(a)熔点在10摄氏度内的线性或基本上线性的聚丙烯,熔体流动速率与(a)明显不同且与(a)混溶)。 和(c)与(a)不混合的聚乙烯,其产生具有至少四毫米的平均泡孔尺寸并且具有至少40%的固有的开孔含量的聚合物泡沫。 HMS PP占(a)和(b)的总组合重量的60重量%(wt%)以上且90重量%以下。 组分(c)占总聚合物共混物重量的60重量%或更少。
摘要:
Provided is a melt composition for a heat shrinkable foam structure that includes at least one base polymer and a blowing agent made from at least one heat-activated chemical compound encapsulated by a plurality of polymeric shells. The melt composition may also include a crosslinking promoter or other additives. Also provided is a method for making a heat- shrinkable polymer foam tubing. A melt composition containing at least one base polymer material having a melt temperature and a blowing agent having an activation temperature is provided. The melt composition is mixed at an elevated temperature. The melt composition is then extruded through a die at a high temperature. The extruded foam tube is then processed, often heat-processed. Additionally provided is a heat shrinkable foamed polymer tube containing an inner layer and an outer layer of an extruded foamed polymer tube, where each layer is made from at least one base polymer and a blowing agent and the blowing agent includes a heat-activated chemical compound encapsulated in a plurality of polymer shells.
摘要:
An extruded foam sheet of a crosslinked polyolefin resin. It can have a reduced thickness while retaining excellent flexibility and heat resistance. The foam sheet is obtained by supplying to an extruder a polyolefin resin and a heat decomposition type blowing agent, melt-kneading the ingredients, extruding the mixture from the extruder into a sheet form, and foaming the resultant foamable polyolefin resin sheet. The foam sheet of a crosslinked polyolefin resin is characterized in that the foam sheet has a degree of crosslinking of 5 to 60 wt.% and a cell aspect ratio (average MD cell diameter/average CD cell diameter) of from 0.25 to 1 and that the polyolefin resin comprises at least 40 wt.% polyethylene resin obtained with, as a polymerization catalyst, a metallocene compound containing a tetravalent transition metal.