Method of rotational molding using a resin blend and the resulting molded objects
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08L-023/00
C08L-023/04
C08L-029/04
C08L-073/00
C08J-003/00
출원번호
US-0217986
(2002-08-13)
발명자
/ 주소
Swain, Robert D.
출원인 / 주소
Chroma Corporation
대리인 / 주소
Leydig, Voit & Mayer, Ltd.
인용정보
피인용 횟수 :
4인용 특허 :
14
초록▼
A method for making rotationally molded objects using resin blends. The resin blend comprises resin pellets and an amount of ground resin powder sufficient to yield rotomolded objects having desirable impact strength and other strength characteristics. Preferably, the resin blend comprises of from a
A method for making rotationally molded objects using resin blends. The resin blend comprises resin pellets and an amount of ground resin powder sufficient to yield rotomolded objects having desirable impact strength and other strength characteristics. Preferably, the resin blend comprises of from about 20% to about 50% by weight of ground resin powder. The resin pellets may optionally contain a reinforcing agent, and such pellets serve as a vehicle for effectively introducing desired reinforcing agents into the product being rotomolded. In addition, resin blends can be used to produce colored objects by rotational molding techniques.
대표청구항▼
1. A resin blend composition for use in rotational molding comprising resin pellets and ground resin powder made of the same resin to yield a single-layered rotomolded object, wherein said ground resin powder is present in an amount of from about 20% to about 50% by weight based on the total weight
1. A resin blend composition for use in rotational molding comprising resin pellets and ground resin powder made of the same resin to yield a single-layered rotomolded object, wherein said ground resin powder is present in an amount of from about 20% to about 50% by weight based on the total weight of the resin blend composition, and wherein said resin pellets include a reinforcing agent. 2. The resin blend composition of claim 1, wherein said ground resin powder is present in an amount of from about 20% to about 30% by weight based on the total weight of the resin blend composition. 3. The resin blend composition of claim 2, wherein said ground resin powder is present in an amount of about 30% by weight based on the total weight of the resin blend composition. 4. The resin blend composition of claim 1, wherein said ground resin powder is present in an amount of no more than about 30% by weight based on the total weight of the resin blend composition. 5. The resin blend composition of claim 2, wherein said resin pellets and ground resin powder are polyethylene. 6. The resin blend composition of claim 5, wherein said resin pellets and ground resin powder are linear low-density polyethylene. 7. The resin blend composition of claim 1, wherein the concentration of said reinforcing agent in the resin pellets is from about 10% to about 80% by weight of the resin pellets. 8. The resin blend composition of claim 7, wherein said reinforcing agent is selected from the group consisting of inorganic fibers, organic fibers, and mineral fillers. 9. The resin blend composition of claim 8, wherein said reinforcing agent is inorganic fibers. 10. The resin blend composition of claim 9, wherein said inorganic fibers are glass fibers. 11. A resin blend composition for use in rotational molding comprising resin pellets and ground resin powder made of the same resin to yield a first single-layered rotomolded object, wherein said resin pellets include a reinforcing agent, and wherein said ground resin powder is present in a sufficient amount such that the first rotomolded object has strength characteristics substantially similar to a second rotomolded object produced from a resin composition containing 100% ground resin particles. 12. The resin blend composition of claim 11, wherein the resin pellets and ground resin powder are made of the same resin. 13. The resin blend composition of claim 11, wherein the tensile strength at yield of the first rotomolded object is about 20 mPa. 14. The resin blend composition of claim 11, wherein the percent elongation at break of the first rotomolded object is about 1100%. 15. The resin blend composition of claim 11, wherein the tensile stress at break of the first rotomolded object is about 20 mPa. 16. The resin blend composition of claim 11, wherein the concentration of said reinforcing agent in the resin pellets is from about 10% to about 80% by weight of the resin pellets. 17. The resin blend composition of claim 16, wherein the concentration of said reinforcing agent in the resin pellets is from about 20% to about 50% by weight of the resin pellets. 18. The resin blend composition of claim 16, wherein said reinforcing agent is selected from the group consisting of inorganic fibers, organic fibers, and mineral fillers. 19. The resin blend composition of claim 18, wherein said inorganic fibers are glass fibers. 20. The resin blend composition of claim 11, wherein said reinforcing agent is selected from to group consisting of inorganic fibers, organic fibers, and mineral fillers. 21. The resin blend composition of claim 20, wherein said reinforcing agent is inorganic fibers. 22. The resin bland composition of claim 21, wherein said inorganic fibers are glass fibers. 23. A resin blend composition for use in rotational molding comprising resin pellets and ground resin powder made of the same resin to yield a single-layered rotomolded object, wherein said resin pellets include a reinforcing agent and wherein the rotomolded object has a tensile strength at yield of about 20 mPa, a percent elongation at break of about 1100%, and a tensile stress at break of about 20 mPa. 24. The resin blend composition of claim 23, wherein said reinforcing agent is selected from the group consisting of inorganic fibers, organic fibers, and mineral fillers. 25. The resin blend composition of claim 24, wherein said reinforcing agent is inorganic fibers. 26. The resin blend composition of claim 25, wherein said inorganic fibers are glass fibers.
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이 특허에 인용된 특허 (14)
Strebel Jeffrey J., Composition and process for rotational molding foamed articles.
Schrijver Jan (Roosteren NLX) Vossebeld Arnold (Beek NLX), Polymer powder compositions, particularly polyethylene powder compositions and objects to be made and made thereof.
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