欢乐颂第二季,新寡妇村传奇,遮天 辰东 小说笔趣阁 http://yqxg.com.cn/taxonomy/term/2920/all zh-hans 抗疲勞地墊 http://yqxg.com.cn/kpld.htm <div class="field field-name-field-image-cache field-type-image field-label-hidden"><div class="field-items"><div class="field-item even"><img src="http://yqxg.com.cn/sites/default/files/styles/watermark/public/product_images/18.jpg?itok=F8DbBXZA" width="790" height="566" alt=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" title=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" /></div><div class="field-item odd"><img src="http://yqxg.com.cn/sites/default/files/styles/watermark/public/product_images/111.jpg?itok=A7mkIMWC" width="800" height="567" alt=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" title=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" /></div><div class="field-item even"><img src="http://yqxg.com.cn/sites/default/files/styles/watermark/public/product_images/222.jpg?itok=B0r4mVnd" width="800" height="567" alt=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" title=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" /></div><div class="field-item odd"><img 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src="http://yqxg.com.cn/sites/default/files/styles/watermark/public/product_images/13_1.jpg?itok=JXXiJRgq" width="790" height="541" alt=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" title=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" /></div><div class="field-item even"><img src="http://yqxg.com.cn/sites/default/files/styles/watermark/public/product_images/14_0.jpg?itok=rGqvYkMh" width="790" height="558" alt=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" title=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" /></div><div class="field-item odd"><img src="http://yqxg.com.cn/sites/default/files/styles/watermark/public/product_images/16_0.jpg?itok=MYMxuUZl" width="790" height="594" alt=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" title=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" /></div><div class="field-item even"><img src="http://yqxg.com.cn/sites/default/files/styles/watermark/public/product_images/19.jpg?itok=hbbVBfYP" width="790" height="541" alt=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" title=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" /></div><div class="field-item odd"><img src="http://yqxg.com.cn/sites/default/files/styles/watermark/public/product_images/20.jpg?itok=CXRBKsvA" width="790" height="691" alt=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" title=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" /></div><div class="field-item even"><img src="http://yqxg.com.cn/sites/default/files/styles/watermark/public/product_images/21_0.jpg?itok=MJuKtKRz" width="790" height="597" alt=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" title=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" /></div><div class="field-item odd"><img src="http://yqxg.com.cn/sites/default/files/styles/watermark/public/product_images/22_0.jpg?itok=x1TJm-ZE" width="790" height="510" alt=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" title=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" /></div><div class="field-item even"><img src="http://yqxg.com.cn/sites/default/files/styles/watermark/public/product_images/23_0.jpg?itok=Y_KjCsv-" width="790" height="507" alt=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" title=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" /></div><div class="field-item odd"><img src="http://yqxg.com.cn/sites/default/files/styles/watermark/public/product_images/24_0.jpg?itok=s_CeeJ-Z" width="790" height="505" alt=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" title=" 防疲勞地墊,抗疲勞墊,抗疲勞地墊,防靜電抗疲勞墊" /></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>防滑抗疲勞地墊,全橡膠結(jié)構(gòu),有舒適抗疲勞作用。是超市、實(shí)驗(yàn)室、食品加工區(qū)、酒店、健身房、汽車(chē)維修中心、衛(wèi)生間和盥洗室等區(qū)域<br /> 必不可少的清潔和勞動(dòng)保護(hù)工具??梢詾楣ぷ鲙?lái)減緩疲勞、降低噪音、延長(zhǎng)站立工作時(shí)間和提高工作效率的作用。</p> <p>特點(diǎn)編輯</p> <p>1. 表面防滑紋理結(jié)構(gòu)和有坡度的邊緣設(shè)計(jì),防滑倒、絆倒。</p> <p>2.復(fù)合層結(jié)構(gòu)有效緩沖腳部壓力,緩解疲勞;</p> <p>3.清潔方便,易于遷移,不影響正常的工作環(huán)境;</p> <p>4.表面防滑設(shè)計(jì),使用更安全;</p> <p>5.可耐酸堿溶劑</p> <p>6.高性能抗疲勞,緩解腳部血液流通壓力,提高員工健康指數(shù)和安全系數(shù)。</p> <p>7.規(guī)格:0.98m*1.6m*15mm</p> </div></div></div><div class="field field-name-field-price-vip field-type-number-float field-label-above"><div class="field-label">大客戶報(bào)價(jià):&nbsp;</div><div class="field-items"><div class="field-item even">0.00</div></div></div><div class="field field-name-field-price-direct field-type-number-float field-label-above"><div class="field-label">直接客戶報(bào)價(jià):&nbsp;</div><div class="field-items"><div class="field-item even">0.00</div></div></div><div class="field field-name-field-price-mid field-type-number-float field-label-above"><div class="field-label">中間商報(bào)價(jià):&nbsp;</div><div class="field-items"><div class="field-item even">0.00</div></div></div><div class="field field-name-taxonomy-vocabulary-1 field-type-taxonomy-term-reference field-label-above"><div class="field-label">產(chǎn)品分類(lèi):&nbsp;</div><div class="field-items"><div class="field-item even"><a href="/category/2668">防靜電抗疲勞墊</a></div></div></div><div class="field field-name-taxonomy-vocabulary-7 field-type-taxonomy-term-reference field-label-above"><div class="field-label">品牌分類(lèi)表:&nbsp;</div><div class="field-items"><div class="field-item even"><a href="/CleanMax">順騰 CleanMax</a></div></div></div><div class="field field-name-taxonomy-vocabulary-9 field-type-taxonomy-term-reference field-label-above"><div class="field-label">搜索關(guān)鍵字:&nbsp;</div><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/2918">防疲勞地墊</a></div><div class="field-item odd"><a href="/taxonomy/term/2919">抗疲勞墊</a></div><div class="field-item even"><a href="/taxonomy/term/2920">抗疲勞地墊</a></div><div class="field-item odd"><a href="/taxonomy/term/2921">防靜電抗疲勞墊</a></div></div></div><div class="field field-name-field-product-image field-type-image field-label-above"><div class="field-label">縮略圖:&nbsp;</div><div class="field-items"><div class="field-item even"><img src="http://yqxg.com.cn/sites/default/files/kpld_0.jpg" width="299" height="300" alt="" /></div></div></div> Mon, 21 May 2018 11:56:49 +0000 goodmro 4699 at http://yqxg.com.cn 電子材料在接觸、摩擦?xí)r,如是在防靜電臺(tái)墊上除靜電 http://yqxg.com.cn/tech4716.html <div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><div class="saved-items-image" style="margin-top: 30px;"><a href="http://yqxg.com.cn/views_hwid_63.htm" title="防靜電臺(tái)墊_防靜電膠皮"><img alt="防靜電臺(tái)墊_防靜電膠皮" src="http://yqxg.com.cn/sites/default/files/imagecache/product_list/product_images/2007327223437.jpg"></a></div><div class="saved-items-info"><h4 class="product-name"><a href="http://yqxg.com.cn/views_hwid_63.htm" title="防靜電臺(tái)墊_防靜電膠皮">防靜電臺(tái)墊_防靜電膠皮</a></h4><div class="product-date-added"><strong>產(chǎn)品編號(hào):</strong><a href="http://yqxg.com.cn/views_hwid_63.htm" title="防靜電臺(tái)墊_防靜電膠皮">ST-1101</a></div><div class="product-date-added"><strong>產(chǎn)品品牌:</strong>&nbsp;<a href="http://yqxg.com.cn/CleanMax">順騰 CleanMax&nbsp;</a>&nbsp;&nbsp;</div><div class="product-date-added"><p style="margin: 5px;">防靜電臺(tái)墊,膠皮(地墊)綠色防靜電膠板,防靜電桌墊產(chǎn)品簡(jiǎn)介:防靜電臺(tái)墊(地墊)主要用導(dǎo)靜電材料、靜電耗散材料及合成橡膠等通過(guò)多種 工藝制作而成。產(chǎn)品一般為二層結(jié)構(gòu),表面層為靜電耗散層,底層為導(dǎo)電層。臺(tái)墊使用時(shí)間持久,具有很好的防酸、防堿、防化學(xué)熔劑特性,并且耐磨,易清洗。</p></div><div class="product-date-added"><strong>相關(guān)關(guān)鍵詞:</strong><ul class="links inline"><li class="taxonomy_term_689 first"><a href="http://yqxg.com.cn/sortid_2_nsortid_13.htm" rel="tag" title="防靜電臺(tái)墊">防靜電臺(tái)墊</a></li>&nbsp;<li class="taxonomy_term_698"><a href="http://yqxg.com.cn/CleanMax" rel="tag" title="順騰 CleanMax">順騰 CleanMax</a></li>&nbsp;<li class="taxonomy_term_2805"><a href="http://yqxg.com.cn/taidian.asp" rel="tag" title="防靜電臺(tái)墊">防靜電臺(tái)墊</a></li>&nbsp;<li class="taxonomy_term_2950"><a href="http://yqxg.com.cn/search2950.html" rel="tag" title="防靜電地墊">防靜電地墊</a></li>&nbsp;<li class="taxonomy_term_2949"><a href="http://yqxg.com.cn/search[sid].html" rel="tag" title="防靜電膠板">防靜電膠板</a></li>&nbsp;<li class="taxonomy_term_2806 last"><a href="http://yqxg.com.cn/search/%E9%98%B2%E9%9D%99%E7%94%B5%E8%83%B6%E7%9A%AE" rel="tag" title="防靜電膠皮">防靜電膠皮</a></li></ul></div></div><p><br><br><br><br><br><br><br><br><br><br><br><br><br><br>&nbsp; &nbsp; 任何兩種化學(xué)組成不同,或兩種化學(xué)組成相同但物理狀態(tài)不同的材料,其內(nèi)部結(jié)構(gòu)中的電荷載流子能量分布是不同的。當(dāng)這樣的兩種材料在接觸、摩擦?xí)r,就會(huì)在<a href="http://yqxg.com.cn/sortid_2_nsortid_13.htm" rel="tag" title="防靜電臺(tái)墊">防靜電臺(tái)墊</a>表面上發(fā)生電荷再分配而形成雙電層。當(dāng)將它們重新分離后,每一種材料上就會(huì)帶有比接觸、摩擦前過(guò)量的正(或負(fù))電荷。這種使物體帶有電荷的過(guò)程稱(chēng)為起電。</p><div>&nbsp; &nbsp; 起電過(guò)程一般有接觸起電、摩擦起電、光電起電、熱電發(fā)射起電、場(chǎng)致發(fā)射起電、分散粒子起電、機(jī)械斷裂起電及電暈起電等。最常見(jiàn)的是接觸起電和摩擦起電。輕微摩擦?xí)r的起電特征可近似看作為一系列的緊密接觸和分離過(guò)程,造成電荷在防靜電服表面間轉(zhuǎn)移而產(chǎn)生靜電。但在劇烈摩擦?xí)r,由于防靜電鞋局部接觸面以較高的速度作相對(duì)運(yùn)動(dòng),會(huì)使防靜電鞋因發(fā)熱甚至軟化,兩摩擦面間還可能有質(zhì)量交換。因此,<a href="http://yqxg.com.cn/sortid_2_nsortid_13.htm" rel="tag" title="防靜電臺(tái)墊" style="font-size: 0.75em;">防靜電臺(tái)墊</a><span style="font-size: 0.75em;">材料摩擦起電的符號(hào)有時(shí)會(huì)與防靜電服接觸面上的壓力有關(guān),例如將粘膠絲織物與不銹鋼棒摩擦?xí)r,壓力小時(shí)織物帶正電,壓力大時(shí)則帶負(fù)電。又如兩根相同材料的橡皮棒作一動(dòng)一靜的非對(duì)稱(chēng)摩擦?xí)r,動(dòng)棒帶正電。反復(fù)劇烈摩擦后,原帶正電的棒變?yōu)閹ж?fù)電。這些現(xiàn)象除兩物體接觸電位高低外,還應(yīng)考慮Seebeck效應(yīng)(即溫差電動(dòng)勢(shì)效應(yīng))。摩擦引起局部升溫,使載流子從高溫向低溫轉(zhuǎn)移。摩擦引起大分子機(jī)械斷裂和熱分解會(huì)產(chǎn)生電子或離子,還會(huì)產(chǎn)生壓電效應(yīng)和熱電效應(yīng)等。所以劇烈摩擦是一個(gè)復(fù)雜的起電過(guò)程。</span></div><div>&nbsp; &nbsp; 高聚物的靜電起電機(jī)理應(yīng)與導(dǎo)電機(jī)理結(jié)合起來(lái)研究。當(dāng)金屬與防靜電服或高聚物間接觸和分離起電過(guò)程中,會(huì)由于電子轉(zhuǎn)移或離子轉(zhuǎn)移而導(dǎo)致起電,但多數(shù)可能是電子轉(zhuǎn)移的同時(shí)有一定數(shù)量的離子轉(zhuǎn)移而導(dǎo)致起電。</div><div>&nbsp; &nbsp; 電子轉(zhuǎn)移取決于接觸物體問(wèn)的Fermi能或Fermi能級(jí)(E),,其值等于固體內(nèi)電子的電化學(xué)勢(shì),因此E,是一個(gè)熱力學(xué)函數(shù)。電子進(jìn)入固體可看作止于E,處,電子從固體逸出平均來(lái)說(shuō)可看作始于Er處。電子轉(zhuǎn)移平衡時(shí),整個(gè)體系的Fermi能級(jí)在能級(jí)圖上應(yīng)相等。功函數(shù)或電子逸出功就是自由電子能量E。與E,之差。兩物體接觸時(shí),電子的流動(dòng)方向取決于接觸前它們的Fermi能級(jí)的高低或功函數(shù)值,電子總是從功函數(shù)小(E,高)的一方向大(E,低)的一方流動(dòng)。電子移動(dòng)的結(jié)果產(chǎn)生靜電勢(shì)咖,當(dāng)e西與兩物體間功函數(shù)之差相等時(shí)即達(dá)到平衡,此時(shí)各物體在相對(duì)界面附近分別帶有正或負(fù)的等量電荷,但從外部是測(cè)不出帶電的。隨著兩物體分離才開(kāi)始形成分別帶有正和負(fù)的電荷,而在分離過(guò)程中,由于隧道效應(yīng)、場(chǎng)致發(fā)射、氣體放電及通過(guò)物體表面和內(nèi)部的電荷擴(kuò)散等原因,而使分離后實(shí)際觀測(cè)到的總靜電荷小于接觸時(shí)的總電荷。在分離時(shí)還由于電容量大大下降,而使兩物體的電位差迅速增大,從而產(chǎn)生相當(dāng)高的靜電電壓。接觸起電結(jié)果總是功函數(shù)大的帶負(fù)電,功函數(shù)小的帶正電。高聚物的摩擦起電序列基本上與其功函數(shù)大小順序是一致的。</div><div>&nbsp; &nbsp; 人們很早就試圖用<a href="http://yqxg.com.cn/sortid_2_nsortid_13.htm" rel="tag" title="防靜電臺(tái)墊">防靜電臺(tái)墊</a>來(lái)解釋極性基在防靜電鞋靜電起電中的作用。如果<a href="http://yqxg.com.cn/sortid_2_nsortid_13.htm" rel="tag" title="防靜電臺(tái)墊" style="font-size: 0.75em;">防靜電臺(tái)墊</a><span style="font-size: 0.75em;">極性基的能級(jí)高于主鏈能級(jí)。那么這種防靜電服的起電必然取決于極性基的結(jié)構(gòu)。近年來(lái)在應(yīng)用量子理論方來(lái)處理防靜電鞋方面取得了很大進(jìn)展,例如Andre和Del}lall。曾用從頭計(jì)算法和一些半經(jīng)驗(yàn)公式計(jì)算簡(jiǎn)單高聚物的能帶結(jié)構(gòu)和態(tài)密度等。Verbist曾將x射線光電子能譜理論和方法用來(lái)測(cè)定高聚物電子結(jié)構(gòu),并用來(lái)檢驗(yàn)?zāi)軒Ю碚撚?jì)算的結(jié)果。Collins運(yùn)用Gree?!?。函數(shù)法探討了固體和高聚物中的激發(fā)態(tài)問(wèn)題。Brandow建立了閉殼層和開(kāi)殼層系統(tǒng)的相關(guān)能表式,并導(dǎo)出了高聚物電子結(jié)構(gòu)理論中非常有用的有效7r電子Hamilton算符等H…。但高聚物的電子結(jié)構(gòu)與靜電起電關(guān)系中,尚有許多理論和實(shí)驗(yàn)問(wèn)題沒(méi)有解決,有待于今后深入研究。</span></div><p>&nbsp;</p></div></div></div><div class="field field-name-taxonomy-vocabulary-9 field-type-taxonomy-term-reference field-label-above"><div class="field-label">搜索關(guān)鍵字:&nbsp;</div><div class="field-items"><div class="field-item even"><a href="/search/%E9%98%B2%E9%9D%99%E7%94%B5%E8%83%B6%E7%9A%AE">防靜電膠皮</a></div><div class="field-item odd"><a 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field-label-above"><div class="field-label">新聞圖:&nbsp;</div><div class="field-items"><div class="field-item even"><img src="http://yqxg.com.cn/sites/default/files/default_images/noimage_0.jpg" alt="" /></div></div></div> Tue, 19 Jun 2018 12:42:35 +0000 goodmro 4716 at http://yqxg.com.cn