線性低密度聚乙烯(LLDPE)為無(wú)毒、無(wú)味、無(wú)臭的乳白色顆粒 ，密度為0.918~0.935g/cm3。它與LDPE相比，具有較高的軟化溫度和熔融溫度，有LLDPE的生產(chǎn)起始于過(guò)渡金屬催化劑，特別是齊格勒(Ziegler)或飛利浦(Phillips)類(lèi)型。基于環(huán)烯烴金屬衍生物催化劑的新工藝是LLDPE生產(chǎn)的另一個(gè)選擇方案。實(shí)際的聚合反應(yīng)可以在溶液和氣相反應(yīng)器中進(jìn)行。通常,辛烯與乙烯在溶液相反應(yīng)器聚丁烯。己烯與乙烯在氣相反應(yīng)器中聚合。在氣相反應(yīng)器中生成的LLDPE樹(shù)脂是顆粒形式，且可以粉料或進(jìn)一步加工成粒料出售。通常用熔體指數(shù)和密度來(lái)表征線性低密度聚乙烯。熔融指數(shù)可反映出樹(shù)脂的平均分子量且主要受反應(yīng)溫度控制。平均分子量與分子量分布(MWD)無(wú)關(guān)。催化劑選擇影響MWD。 密度由共聚用單體在聚乙烯鏈中的濃度決定。共聚用單體濃度控制短支鏈數(shù)目(其長(zhǎng)度取決于共聚用單體類(lèi)型)從而控制樹(shù)脂密度。高壓LDPE有長(zhǎng)支鏈，而線性LDPE只具有短支鏈。

包裝與儲(chǔ)運(yùn)產(chǎn)品裝于聚乙烯重包薄膜袋內(nèi)，外包裝為聚丙烯 編織袋，每袋凈重25kg。貯存?zhèn)}庫(kù)應(yīng)保持清潔、干燥、陰涼和通風(fēng)良好?？捎没疖?chē) 、汽車(chē) 、輪船 、飛機(jī) 等運(yùn)輸?？砂捶俏ｋU(xiǎn)品運(yùn)輸 。運(yùn)輸工具應(yīng)保持清潔、干燥，不得有鐵釘?shù)燃怃J物。貯運(yùn)過(guò)程中應(yīng)注意防火、防水、防曬、防塵和防污染等。裝卸時(shí)不得使用鐵鉤。

被稱(chēng)為第三代聚乙烯的線性低密度聚乙烯(LLDPE) 樹(shù)脂，除具有一般聚烯烴樹(shù)脂的性能外，其抗張強(qiáng)度、抗撕裂強(qiáng)度、耐環(huán)境應(yīng)力開(kāi)裂性、耐低溫性、耐熱性和耐穿刺性尤為優(yōu)越，獲得了注目的發(fā)展。

Borstar® LE8706

線性低密度聚乙烯

Borealis AG

產(chǎn)品說(shuō)明：

Borstar LE8706 is a natural colourable linear low density (LLD) jacketing compound, which is produced with the Borealis proprietary Borstar bimodal process technology.

Borstar technology allows the manufacturing of polymers outside the traditional MFR and density range making it possible to optimize processability, reduce shrinkage and yet provide excellent physical toughness and environmental stress crack resistance (ESCR).

Borstar LE8706 contains a well dispersed UV-stabiliser in sufficient amount providing a measure of weathering resistance.

The abrasion resistance combined with low coefficient of friction makes it ideally suitable for the jacketing of energy and communication cables. Borstar LE8706 offers a balance of properties giving advantages in manufacturing, installation and lifetime performance of communication and energy cables.

Borstar LE8706 meets the applicable requirements as below when processed using sound extrusion practice and testing procedure:

• ASTM D 1248 Type I, Class A, Category 4, Grade E4, E5, J3

• DMP 5, 6, 13, 16, 18

• EN 50290-2-24

• IEC 60502, Part 2, Type ST7

• IEC 60840, Type ST7

• HD 603 S1 DMP 6

• HD 620 S2 Part 1, table 4B

Borstar® LE8706 物性表