Methods for manufacturing articles having a starch-bound cellular matrix
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29C-065/00
출원번호
US-0353544
(1994-12-09)
발명자
/ 주소
Andersen Per Just
Hodson Simon K.
출원인 / 주소
E. Khashoggi Industries
대리인 / 주소
Workman, Nydegger & Seeley
인용정보
피인용 횟수 :
46인용 특허 :
220
초록▼
Compositions, methods, and systems for manufacturing articles, particularly containers and packaging materials, having a starch-bound cellular matrix reinforced with substantially uniformly dispersed fibers. High strength articles that have adequate flexibility and toughness immediately or very shor
Compositions, methods, and systems for manufacturing articles, particularly containers and packaging materials, having a starch-bound cellular matrix reinforced with substantially uniformly dispersed fibers. High strength articles that have adequate flexibility and toughness immediately or very shortly after being demolded without the need for subsequent conditioning are molded from compositions having a starch-based binder and fibers that are uniformly dispersed by means of a high yield stress fluid fraction within the starch-based composition. In a two-step mixing process, a preblended mixture is formed by gelating a portion of the starch-based binder or other thickening agent in water to form a liquid phase having high yield stress into which the fibers are substantially uniformly dispersed. The fibers preferably have an average length of at least about 2 mm and an aspect ratio of at least about 25:1. The remaining starch-based binder, water, and other desired admixtures, such as mold-release agents, inorganic fillers, rheology-modifying agents, plasticizers, integral coating or sealing materials, and dispersants, are added to the preblended mixture to form a moldable starch-based composition, which is molded between heated molds to produce form-stable articles having a desired shape and a selectively controlled foamed structural matrix. Such articles can replace articles presently made from conventional materials like paper, paperboard, polystyrene, plastic, or other organic-based materials and have especial utility in the mass-production of containers, particularly food and beverage containers.
대표청구항▼
[ What is claimed and desired to be secured by United States Letters Patent is:] [1.] A method for manufacturing an article of manufacture having a fiber-reinforced, starch-bound cellular matrix, the method comprising the steps of:mixing water, a thickening agent, an ungelatinized starch-based binde
[ What is claimed and desired to be secured by United States Letters Patent is:] [1.] A method for manufacturing an article of manufacture having a fiber-reinforced, starch-bound cellular matrix, the method comprising the steps of:mixing water, a thickening agent, an ungelatinized starch-based binder and fiber having an average aspect ratio greater than about 25:1 together to form a starch-based composition, the water and thickening agent comprising a fluid fraction having a yield stress such that the fibers are substantially uniformly dispersed throughout the starch-based composition during the mixing step;forming the starch-based composition into a desired shape of the article of manufacture by heating the composition in a mold to a temperature sufficient to substantially gelatinize the starch-based binder and remove at least a portion of the water by evaporation in order to solidify the starch-based binder; andremoving the formed article from the mold after a substantial portion of the water has been removed from the starch-based composition.
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이 특허에 인용된 특허 (220)
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