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[材料介紹] 物理發(fā)泡材料
P:2011-02-28 10:33:06
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理發(fā)泡絕緣料HD1029
HD1029是一種應(yīng)用于通信電纜、同軸電纜、信號電纜絕緣層擠包的物理發(fā)泡專用樹脂。
HD1029凈化度高，灰分含量低使該材料具有優(yōu)異的電氣性能；HD、LD、LLD多元復合使該材料同時具備良好的機械物理性能和較高的熔體強度；勻稱的晶格結(jié)構(gòu)使成型物泡孔更臻細密；可以任意調(diào)節(jié)的配比濃度；無粉塵飛揚之害；有分散均勻之利。
HD1029典型工藝條件如下：
一區(qū) | 二區(qū) | 三區(qū) | 四區(qū) | 五區(qū) | 機頭 | 口模 | 螺桿轉(zhuǎn)速 | L/D |
26--32 | >24 |
上表所列僅供參考，實際加工溫度的分布用戶應(yīng)根據(jù)擠出機本身的技術(shù)參數(shù)具體設(shè)計，通過平緩的調(diào)整和實際操作來建立。
為防止泡孔在擠出機中增大，在熔融段應(yīng)保持適當壓力，若壓力不夠，將出現(xiàn)大的氣隙和孔洞。篩網(wǎng)選擇，模芯、模套的配合都是影響熔融壓力的要素。
［hdkj 在 2011-2-28 10:34:46 編輯過］
［hdkj 在 2011-2-28 10:59:21 編輯過］
double sheath - 雙護套 （0） 投訴
P:2011-02-28 11:06:53
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北歐化工的HE4873，適用于生產(chǎn)3mm以下的同軸電纜，無需添加任何的成核劑，直接使用，有需要的話可以與我聯(lián)系
Polyolefins
Borcell™ HE4873
HD Polyethylene Compound for Gas Injection of Cellular Data Cable Insulation
Description
Borcell™ HE4873 is a high-density polyethylene containing blowing agent for the production of foam or
foam-skin insulation. The fine, uniform and closed cell structure results from the incorporation of a special
nucleating agent.
Applications
Borcell HE4873 is intended for the insulation of data cables using a gas injection foaming process.
NOTE: If using Borcell HE4873 as telephone single insulation, especially in petroleum jelly filled cables,
addition of extra stabilization may be needed to ensure long-term heat stability.
Specifications
Borcell HE4873 meets the applicable requirements as below when processed using sound extrusion practice
and testing procedure:
- ASTM D 1248 Type III, Category 3
- ISO 1872-PE, KEGHN, 45-D045
- EN 50288
- EN 50290-2-23
Physical Properties
Typical Value* Unit Test Method
Density
Melt Flow Rate (
Tensile Strength 25 MPa ISO 527
Elongation 200 % ISO 527
Oxygen Induction Time,
Durometer Hardness (1 sec) 61 Shore D ISO 868
Brittleness Temperature <-
* Data should not be used for specification work
BorcellTM is a trademark of Borealis A/S.
Electrical Properties
Typical Value* Unit Test Method
Dielectric Constant (1 MHz) 2.3 - IEC 60250
Dissipation Factor (1 MHz) 400 - IEC 60250
DC Volume Resistivity 10^16 Ω cm IEC 60093
Dielectric Strength 22 kV/mm IEC 60243
* Data should not be used for specification work
Processing Guidelines
Borcell HE4873 can be processed over a wide range of conditions. The construction, line speed and type
of gas injection system play an important role when selecting proper process conditions.
As a guideline the following figures are given for extruders equipped with five zones on the barrel, head
and die.
Symmetric pair cables
Barrel
Head
Die
Delivery
Form: Granules
Package:
Bulk
Safety
Borcell HE4873 is not classified as a dangerous preparation.
The product is supplied in form of free-flowing granules of approximately 3 -
handled with commercially available equipment. Handling and transport of the product may generate some
dust and fines, which constitute a potential hazard for dust explosion. All metal parts in the system should
therefore be properly grounded. Properly designed equipment and good housekeeping will reduce the risk.
Check and follow local codes and regulations!
Inhalation of any type of dust should be avoided as it may cause irritation of the respiratory system.
The product is intended for industrial use only. A Safety Data Sheet is available on request. Please contact
your Borealis representative for more details on various aspects of safety, recovery and disposal of the
product.
Disclaimer
The information contained herein is to our knowledge accurate and reliable as of the date of publication. Borealis extends no warranties
and makes no representations as to the accuracy or completeness of the information contained herein, and assumes no responsibility
regarding the consequences of its use or for any printing errors.
Our products are intended for sale to industrial and commercial customers. It is the customer's responsibility to inspect and test our products
in order to satisfy himself as to the suitability of the products for the customer's particular purpose. The customer is also responsible
for the appropriate, safe and legal use, processing and handling of our products. Nothing herein shall constitute any warranty (express or
implied, of merchantability, fitness for a particular purpose, compliance with performance indicators, conformity to samples or models,
non-infringement or otherwise), nor is protection from any law or patent to be inferred. No statement herein shall be construed as an
endorsement of any product or process.
Insofar as products supplied by Borealis or its subsidiary companies are used in conjunction with third party materials, it is the responsibility
of the customer to obtain all necessary information relating to the third party materials and ensure that Borealis’ products when used
together with these materials are suitable for the customer’s particular purpose. No liability can be accepted in respect of the use of Borealis’
products in conjunction with other materials. The information contained herein relates exclusively to our products when not used in
conjunction with any third party materials.
LT - line terminal[-tion]線路終端 （0） 投訴
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