Title:
SHEET COMPOSITION FOR A PIPE CONNECTION, AND SHEET FOR ELECTROFOAMING FUSION AND CONNECTING APPARATUS FOR UNDERGROUND PIPES USING THE SHEET COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2011/083913
Kind Code:
A3
Abstract:
The present invention relates to a connecting apparatus used for connecting underground pipes and to a composition for preparing a foamed sheet used for same. Specifically, the present invention relates to a sheet composition for a pipe connection which comprises 1 to 10 parts by weight of a masterbatch including low-density polyethylene, high-density polyethylene, a maleic anhydride graft copolymer, a metallocene polyethylene elastomer, a foaming agent, and an additive, based on 100 parts by weight of a base resin including low-density polyethylene, high-density polyethylene, a maleic anhydride graft copolymer, and a metallocene polyethylene elastomer. When using the composition according to the present invention, a non-foamed sheet is manufactured during melt extrusion, and a foamed sheet is obtained at a high temperature by laminating the non-foamed sheet with a heater line and applying electricity thereto. Therefore, the sheet composition can be fused and filled into a pipe.
Inventors:
JOO SOO YOUNG (KR)
Application Number:
PCT/KR2010/008126
Publication Date:
November 03, 2011
Filing Date:
November 17, 2010
Export Citation:
Assignee:
AZUMI CO LTD (KR)
JOO SOO YOUNG (KR)
JOO SOO YOUNG (KR)
International Classes:
C08L23/04; C08J3/22; C08J9/22; F16L21/00
Foreign References:
| KR20080057794A | 2008-06-25 | |||
| KR20090095046A | 2009-09-09 | |||
| KR20000019277U | 2000-11-06 | |||
| JPH05157192A | 1993-06-22 | |||
| JP2003253033A | 2003-09-10 |
Other References:
See also references of EP 2508561A4
Attorney, Agent or Firm:
KWON, Oh-Sig et al. (921 Dunsan-dong, Seo-gu, Daejeon 302-120, KR)
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Claims: