Abstract:
A polypropylene resin in-mold foam molded article that has a volume resistivity value of 10 Ω·cm or more and 5,000 Ω·cm or less and is produced from polypropylene resin foamed particles including a polypropylene resin composition containing 11 parts by weight or more and 25 parts by weight or less of an electroconductive carbon black having a DBP absorption amount of 300 cm3/100 g or more and 600 cm3/100 g or less and 3 parts by weight or more and 15 parts by weight or less of melamine cyanurate relative to 100 parts by weight of a polypropylene resin has a low open-cell ratio, excellent electric conductivity, and excellent flame retardancy. In particular, a polypropylene resin in-mold foam molded article that is produced from polypropylene resin foamed particles containing an inorganic foaming agent and conventionally having low flame retardancy exhibits excellent flame retardancy.
Abstract:
Rigid polystyrene foams contain thermally treated non-graphitic anthracite coke particles. Such athermanous materials permit a more energy-efficient grinding process, wherein the ground particles are yielded in the desired platelet form and these ground particles also disperse well in a polystyrene matrix. Therefore the rigid polystyrene foams containing the anthracite coke particles have a density of less than 40 kg/m3 and a thermal conductivity of less than 40 mW/m·K which provides desired thermal insulation properties.
Abstract translation:刚性聚苯乙烯泡沫包含热处理非石墨化无烟煤焦炭颗粒。 这种惰性材料允许更节能的研磨过程,其中研磨颗粒以期望的血小板形式产生,并且这些研磨颗粒也在聚苯乙烯基质中良好分散。 因此,含有无烟煤焦炭颗粒的刚性聚苯乙烯泡沫具有小于40kg / m 3的密度和小于40mW / m·K的热导率,其提供期望的绝热性能。
Abstract:
Polyethylene-based resin foamed particles are obtained having good productivity, achieve an increase in foaming ratio, and in which a miniaturization of the average cell diameter is suppressed. A polyethylene-based resin in-mold-foam-molded body using the foamed particles is reduced in yellowing of the surface of the molded body and has favorable surface beauty (surface smoothness). The foamed particles contain, as a base resin, a polyethylene-based resin composition containing 1000 ppm or more and 4000 ppm or less in total of one or more compounds selected from the group consisting of antioxidants, metal stearates, and inorganic substances and 50 ppm or more and 20000 ppm or less of hydrophilic compounds, in which the Z average molecular weight is 30×104 or more and 100×104 or less, the surface layer film thickness is 11 μm or more and 120 μm or less, and the open-cell ratio is 12% or less.
Abstract:
Decorative foamed articles are prepared from foamed pellets, beads, particles, or other articles of a thermoplastic elastomer infused with a supercritical fluid in a pressurized container, then rapidly depressurized and heated either by immersion in a heated fluid that can rapidly heat the article or with infrared or microwave radiation to heat and foam the pellets, beads, particles, or other articles that are then molded into the articles. The pellets are dyed with a nonionic or anionic dye one of: (1) before being infused with the supercritical fluid, (2) during being infused with the supercritical fluid by a nonionic or anionic dye dissolved or dispersed in the supercritical fluid, which optionally comprises a polar liquid, (3) during immersion in the heated fluid, where the heated fluid contains the dye, or (4) after being foamed.
Abstract:
In order to obtain a flame-retardant polyolefin resin expanding molded product which has excellent in-mold moldability and excellent surface appearance and satisfies the FMVSS flammability even if carbon black is added, polyolefin resin particles containing, with respect to 100 parts by weight of polyolefin resin, (i) 0.03 part by weight to 5 parts by weight of phosphorous flame retardant having a phosphorous content of 7% by weight or more, a melting point of 120° C. or more, and a 5% by weight decomposition temperature within a range of 240° C. to 320° C. and (ii) 0.5 part by weight to 20 parts by weight of carbon black are expanded.
Abstract:
Provided are pre-expanded polypropylene resin particles having a dimensional expansion coefficient of 1.5% or more determined with a thermomechanical analyzer at a constant compressive load of 1 mg during heating from 30° C. to 100° C. at a temperature increase rate of 10° C./min. Using the pre-expanded polypropylene resin particles can yield an in-mold foam molded product of polypropylene resin having few wrinkles and small dimensional shrinkage without pretreatment such as internal pressure application or compression packing during packing the pre-expanded particles in a mold for in-mold foam molding.
Abstract translation:本发明提供一种预发泡聚丙烯树脂颗粒,其在30℃至100℃的温度下以10℃的恒定压缩载荷下,用热机械分析仪测定的尺寸膨胀系数为1.5%以上。 °C / min。 使用预发泡的聚丙烯树脂颗粒可以产生具有很少皱纹和小尺寸收缩的聚丙烯树脂的模内发泡模制产品,而不需要预处理,例如在将预发泡颗粒包装在模具中的内部压力施加或压缩填料, 模具发泡成型。
Abstract:
A noncrosslinked polyethylene resin expanded particle is provided having a bulk density in a range of 10 g/L to 100 g/L, the particle being obtained by expanding a polyethylene resin particle whose density is in a range of 0.920 g/cm3 to 0.940 g/cm3, the noncrosslinked polyethylene resin expanded particle having a shrinkage factor in a range of 2% to 30%, the shrinkage factor being obtained by the following formula (1): Shrinkage Factor=(BD−VBD)×100/VBD (1), wherein: the BD of the noncrosslinked polyethylene expanded particle is a bulk density at 23° C. and at 0.1 MPa (at a normal atmospheric pressure); and the VBD of the noncrosslinked polyethylene expanded particle is a bulk density at 23° C. and at a reduced pressure of 0.002 MPa or less.
Abstract translation:提供了一种非交联聚乙烯树脂膨胀颗粒,其堆积密度在10g / L至100g / L的范围内,该颗粒通过使密度为0.920g / cm 3至0.940g的聚乙烯树脂颗粒膨胀而获得 收缩系数由下式(1)求出:收缩率=(BD-VBD)×100 / VBD(1)/ cm 3,收缩率在2%〜30%的范围内的非交联聚乙烯树脂发泡粒子 ),其中:非交联聚乙烯发泡颗粒的BD在23℃和0.1MPa(在正常大气压)下的堆积密度; 非交联聚乙烯发泡粒子的VBD为23℃,0.002MPa以下的减压下的体积密度。
Abstract:
Polypropylene resin expanded particles include polypropylene resin as base material resin having at least two melting peaks on a DSC curve, the at least two melting peaks including (i) a lowest-temperature melting peak of 100° C. or more but 130° C. or less and (ii) a highest-temperature melting peak of 140° C. or more but 160° C. or less, so that the expanded particles: produce an in-mold foaming molded product at a very low mold heating steam pressure; exhibit low distortion, low shrinkage, and a wide range of heating condition for molding, even if the mold heating steam pressure is increased; have satisfactory moldability when the expanded particles are molded by using a mold having a complicated shape or a large mold; and maintain properties such as compressive strength, substantially unimpaired, when the expanded particles make the in-mold foaming molded product.
Abstract:
To provide a modified PTFE excellent in heat resistance. The modified polytetrafluoroethylene comprises a polymer having units based on tetrafluoroethylene and a polymer having units based on a fluorine-free monomer, wherein the endothermic amount ratio R calculated by a prescribed method is at least 0.65.
Abstract:
The present invention relates to thermally expandable microspheres at least partially prepared from bio-based monomers and to a process of their manufacture. The microspheres comprise a thermoplastic polymer shell encapsulating a blowing agent, wherein the thermoplastic polymer shell comprises a polymer being a homo- or copolymer of a lactone according to formula (1):
wherein each of R1, R2, R3, R4, separately from one another, is selected from the group consisting of H and an alkyl group preferably with 1-4 carbon atoms. The invention further provides expanded microspheres, which can be used in a variety of applications.