久久精品aⅴ无码中文字字幕重口,蜜桃久久久电影,欧美最猛,日韩天天射

PTFE L-5F 日本大金，價(jià)格合理,誠(chéng)信經(jīng)營(yíng)，可全國(guó)供貨（廣東省內(nèi)免費(fèi)送上門(mén)）。支持物流，快遞和貨運(yùn);支持現(xiàn)金，銀行轉(zhuǎn)賬交易。

東莞市廣業(yè)塑膠原料有限公司專(zhuān)業(yè)銷(xiāo)售原裝進(jìn)口塑膠原料，原廠原包，假一賠十，本司貨源穩(wěn)定充足，發(fā)貨準(zhǔn)時(shí)，交期和質(zhì)量均有保障！是專(zhuān)業(yè)塑膠原料供應(yīng)商?。?！可提供COA,SMDS,SGS,COC,UL黃卡和物性表及加工參數(shù)。

PTFE L-5F 日本大金特性：   

PTFE L-5F 日本大金                           

PTFE L-5F 日本大金

PTFE L-5F 日本大金

PTFE L-5F 日本大金

PTFE L-5F 日本大金

PTFE L-5F 日本大金

PTFE L-5F 日本大金

填充PTFE
美國(guó)Allied Chemical公司        Halon TFE2015    Halon TFE1015    Halon TFE3060
    填充劑    石墨    玻纖    青銅粉
性能    熔融溫度℃    331    331    331
    相對(duì)密度    2.12    2.22    3.97
    吸水率（23℃，24h）%        0.015    0.019
    拉伸強(qiáng)度MPa    20.7    23.4    13.1
    伸長(zhǎng)率%    140    300    50
    彎曲強(qiáng)度MPa    17.9    13.8    23.1
    彎曲彈性模量GPa    1.31    1.07    2.00
    壓縮彈性模量GPa    0.79    0.83    1.38
    邵氏硬度（D）    64    64    72
    缺口沖擊J/m    165    133    123
    最高使用溫度℃    間斷    260    260    260
        續(xù)使    232    232    232
    線膨脹系數(shù)10-5/℃    8.3    5.6    8.1
    熱導(dǎo)率W/(m.℃)    0.46    0.39    0.50
性能特點(diǎn)    填充PTFE主要品種有：玻纖填充PTFE，石墨填充PTFE，二硫化鉬填充PTFE，氮化硼填充PTFE，碳纖維填充PTFE，青銅粉填充PTFE。
    玻纖填充PTFE    石墨填充PTFE    二硫化鉬填充PTFE    氮化硼填充PTFE    碳纖維填充PTFE    青銅粉填充PTFE
    具有優(yōu)良的機(jī)械性能和耐氧化性能，但耐堿性較差。玻纖還可與石墨或二硫化鉬混合使用。    具有優(yōu)良的耐化學(xué)藥品性，耐壓縮蠕變性，良好的熱傳導(dǎo)性和較高的抗沖擊強(qiáng)度。磨擦因數(shù)小，但耐磨性比正經(jīng)纖填充PTFE差。    能增加PTFE的表面硬度，降低磨擦因數(shù)和磨損量，而且耐蠕變性和電絕緣性也很好。    具有良好的耐磨損性，耐蠕變性和耐化學(xué)藥品性。    具有優(yōu)良的機(jī)械性能、耐熱性和耐磨擦性能，線膨脹系數(shù)小，熱導(dǎo)率高。與玻纖增強(qiáng)相比，碳纖維增加的PTFE的抗壓強(qiáng)度、耐蠕變性以及在水中的耐磨性均得到大幅度提高。    具有優(yōu)異的耐磨性和抗蠕變性，熱導(dǎo)率高，但電絕緣性和耐化學(xué)藥品性則明顯下降。
成型/加工    模壓
應(yīng)用    主要應(yīng)用于化學(xué)和機(jī)械工業(yè)領(lǐng)域。常用于制作軸承、軸瓦、活塞環(huán)、閥座、政治部體、導(dǎo)向環(huán)、機(jī)床滑動(dòng)導(dǎo)軌、轉(zhuǎn)動(dòng)密封填料、密封圈、密封環(huán)、密封墊片及襯墊等。氟化鋰填充PTFE可用于制熱釋光材料。

氟樹(shù)脂/PPS
品名    RFG-2140U    RG-40JA    PA46
    氟樹(shù)脂/PPS    PPS    PA46
    40%玻纖    40%玻纖    30%玻纖
性能    相對(duì)密度    1.74    1.64    1.40
    拉伸強(qiáng)度MPa    183.2    147.0    158.8
    伸長(zhǎng)率%    2.2    1.4    4.8
    彎曲強(qiáng)度MPa    288.1    209.7    253.8
    彎曲彈性模量GPa    13.4    13.7    8.8
    沖擊J/m    缺口    10.1    8.0    10.7
        無(wú)缺口    63    41    69
    落球試驗(yàn)（100*100*3，球高1.5m，重0.54Kg）    裂縫    斷裂    斷裂
    成型收縮率%    0.2    0.2    0.3
    線膨脹系數(shù)10-5/℃    1.4    1.5    2.8
    熱變形溫度（1.82MPa）℃    >260    >260    >260
    阻燃性UL94    V-0    V-0    HB
    熔體指數(shù)（300℃，載荷5Kg），g/10min    10    17    
    磨擦因數(shù)（對(duì)磨材料S45C鋼）    0.23    0.45    0.41
    吸水率（23℃，24h）%    0.008    0.014    1.46
性能特點(diǎn)    耐沖擊性是RFG-2140U最顯著的特性之一。 RFG-2140U具有優(yōu)異的磨擦磨損性能。 RFG-2140U的吸水率極低，耐熱性?xún)?yōu)于PPS。合金的成型性相比氟樹(shù)脂有了明顯的改善。另外，合金的成型收縮率和尺寸精度與PPS處于同一水平上。
總之 RFG-2140U是一種兼具氟樹(shù)脂的耐熱性、耐化學(xué)藥品性、耐沖擊性和PPS的強(qiáng)度、成型性、尺寸精度的新材料，適用于要求具在各種良好組合性能的領(lǐng)域。
成型/加工    
應(yīng)用    用于制造要求具有高強(qiáng)度、耐沖擊性和耐化學(xué)藥品性的機(jī)械設(shè)備的殼體、罩蓋；要求具有高的強(qiáng)度、剛性、耐熱性和尺寸穩(wěn)定性的齒輪和插頭座等。

PTFE L-5F 日本大金

The mechanical properties of polytetrafluoroethylene are softer. Has a very low surface energy.

Polytetrafluoroethylene (F4, PTFE) has a series of excellent perbance: high temperature - long-term use temperature of 200 to 260 degrees, low temperature - at -100 degrees when still soft; corrosion resistance - resistant to water and all organic solvents; (0.04); non-sticky - has the smallest surface tension in the solid material without adhering to any substance; no toxic - has a physiological inertness; has a physiologically inert life; Excellent electrical perbance, is the ideal C-class insulation material, a thick layer of the newspaper will be able to block the 1500V high pressure; even more smooth than ice. PTFE materials, widely used in the defense industry, atomic energy, oil, radio, electrical machinery, chemical industry and other important departments. Products: polytetrafluoroethylene tetraethylene, pipe, sheet, turning sheet. Polytetrafluoroethylene is a polymer of tetrafluoroethylene. English abbreviation for PTFE. Structural bula: CF3 (CF2CF2) nCF3.20 late 30s found that the 40's into industrial production. The nature of polytetrafluoroethylene relative molecular mass is large, low for hundreds of thousands, high up to 10 million or more.

Although the carbon-carbon bonds and carbon-fluorine bonds in the perfluorocarbons need to absorb energy 346.94 and 484.88kJ / mol, respectively, but the decomb of polytetrafluoroethylene to produce 1mol of tetrafluoroethylene only energy 171.38kJ. So in the pyrolysis, the main depolymerization of tetrafluoroethylene tetrafluoroethylene. The weight loss rate (%) of polytetrafluoroethylene at 260, 370 and 420 ° C is 1 × 10-4.4 × 10-3 and 9 × 10-2, respectively. It can be seen that polytetrafluoroethylene can be used at 260 ℃ for a long time. Due to high temperature cracking also produce highly toxic byproducts Fluorocarbon and perfluoroisobutylene, etc., so pay special attention to safety protection and to prevent the exposure of Teflon open flame.

Mechanical properties

Its friction coefficient is very small, only 1/5 of polyethylene, which is an important feature of the perfluorocarbon surface. And because the fluorine - carbon chain between the molecular force is very low, so polytetrafluoroethylene has a non - stick.

Polytetrafluoroethylene in the -196 ~ 260 ℃ wide temperature range to maintain excellent mechanical properties, perfluorocarbon polymer is one of the characteristics of the low temperature does not brittle.

PTFE density is large, 2.14 a 2. 20g / cm3, almost no water, the balance of water absorption is less than 0. 01%.

Polytetrafluoroethylene is a typical soft and weak polymer, macromolecules between the smaller gravitational attrb, stiffness, hardness, strength are small, in the long-term stress will be debed.

Teflon is prone to creep when loaded, and is a typical plastic with cold flow. The creep of PTFE varies with compressive stress, temperature and crystallinity, and the higher the temperature, the greater the creep. The crystallinity of PTFE is between 55% and 80%, and the creep is not more than 2%. When the crystallinity is below 55% and 80%, the creep increases rapidly.

Teflon mechanical properties of the excellent characteristics of the friction factor is small, between 0. 01 and 0.10, in the existing plastic materials, and even the smallest of all engineering materials.

The friction factor of PTFE increases with the increase of the sliding rate, and when the linear velocity reaches 0. 5 to 1. 0 m / s or more, and the static friction factor is smaller than the dynamic friction factor, this characteristic is used for bearing manufacturing. Reduce its starting resistance, so that from start to operation are very smooth. The friction factor of PTFE decreases with increasing load, and tends to be constant when the load reaches 0. 8 MPa or more. At high speed and high load, the friction coefficient of PTFE is less than 0. 01. From ultra-low temperature to PTFE melting point,

Its friction factor is almost unchanged, only when the surface temperature is higher than the melting point, the friction factor is only a sharp increase.

Due to the small intermolecular gravity, PTFE hardness is low, easy to be worn by other materials. However, as long as the surface roughness of the grinding material is appropriate, the amount of wear of PTEF can be reduced to a considerable extent.

Weatherability

Polytetrafluoroethylene has a high chemical resistance, such as concentrated sulfuric acid, nitric acid, hydrochloric acid, and even boiled in aqua regia, its weight and perbance are no change, almost insoluble in the vast majority of solvents, only 300 ℃ Or more slightly soluble in the whole alkane (about 0.1 g / 100 g). Polytetrafluoroethylene does not absorb moisture, non-combustible, oxygen, UV are very stable, so it has excellent weather resistance.

It is noteworthy that polytetrafluoroethylene can not tolerate a strong reducing atmosphere

Molten alkali bl, ammonia alkali solution (alkali bl dissolved in liquid ammonia), some fluoride (such as TFA), naphthalene sodium salt and so can quickly corrosion polytetrafluoroethylene products

Electrical perbance

Polytetrafluoroethylene in a wide frequency range of dielectric constant and dielectric loss are very low, and the breakdown voltage, volume resistivity and arc resistance are higher.

Radiation resistance

Polytetrafluoroethylene has poor radiation resistance (104 rad), degraded by high energy radiation, and the electrical and mechanical properties of the polymer are significantly reduced.

polymerization

Polytetrafluoroethylene is produced by free radical polymerization of tetrafluoroethylene. The industrial polymerization is carried out in the presence of a large amount of water to disperse the heat of reb and to facilitate the control of the temperature. The polymerization is generally carried out at a pressure of 40 to 80 ° C and a pressure of 3 to 26 kgf / cm 2, and an inorganic persulfate, an organic peroxide as an initiator and an oxidation-reduction initiator system may be used. Approximaby 171.38 kJ of polymerisation per mole of tetrafluoroethylene. Dispersed polyesters should be added with perfluorinated surfactants such as perfluorooctanoic acid or salts thereof.

Coefficient of expansion

(25 to 250 ° C) 10 to 12 × 10 -5 / ° C

如需了解更多關(guān)于PTFE L-5F 日本大金及 的詳細(xì)信息，歡迎致電聯(lián)系。

零風(fēng)險(xiǎn)購(gòu)貨10天無(wú)理由退換貨

為了更好的服務(wù)客戶(hù)，我公司現(xiàn)推出零風(fēng)險(xiǎn)采購(gòu)方案，你在我公司購(gòu)買(mǎi)的貨物只要發(fā)貨后10天內(nèi)。你對(duì)貨物有任何不滿(mǎn)意都可以提出退換申請(qǐng)，在貨物未拆封，不影響二次銷(xiāo)售的情況下，我司將給你辦理退換手續(xù)并承擔(dān)運(yùn)費(fèi)，為你免去任何擔(dān)憂(yōu)。

PTFE L-5F 日本大金