Foamed product and manufacturing method of the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-005/22
B32B-037/00
출원번호
US-0926160
(2010-10-28)
등록번호
US-8227075
(2012-07-24)
우선권정보
JP-2010-085979 (2010-04-02)
발명자
/ 주소
Matsushita, Takamichi
출원인 / 주소
Kankyokeieisogokenkyusho Co., Inc.
대리인 / 주소
Guss, Paul A.
인용정보
피인용 횟수 :
25인용 특허 :
1
초록▼
A foamed product that generates no smoke when incinerated, has a low calorific value, and achieves a desired dimension and thermal insulation performance is provided. A foamed product 1 is formed by heat-mixing, in an extruder 11, a paper pellet 7 that is a mixture of a fine paper powder having a pa
A foamed product that generates no smoke when incinerated, has a low calorific value, and achieves a desired dimension and thermal insulation performance is provided. A foamed product 1 is formed by heat-mixing, in an extruder 11, a paper pellet 7 that is a mixture of a fine paper powder having a particle diameter of 30 to 200 μm and starch, a container recycle pellet 8 that is a mixture of polypropylene, polyethylene, and polystyrene, foamable polypropylene 9, and water 10. A weight distribution is set so that the paper pellet 7 is 50 to 65% by weight, the container recycle pellet 8 is 15 to 25% by weight, the foamable polypropylene 9 is 10 to 30% by weight, and the water 10 is 10 to 20% by weight to these resins and other materials.
대표청구항▼
1. A foamed product formed by heat-mixing and foaming: a paper pellet that is a mixture of 35 to 50% by weight of a fine paper powder having a particle diameter of 30 to 200 μm and 50 to 65% by weight of a hydrophilic macromolecule;a recycled resin that is a mixture of 55 to 65% by weight of a recyc
1. A foamed product formed by heat-mixing and foaming: a paper pellet that is a mixture of 35 to 50% by weight of a fine paper powder having a particle diameter of 30 to 200 μm and 50 to 65% by weight of a hydrophilic macromolecule;a recycled resin that is a mixture of 55 to 65% by weight of a recycled polypropylene resin, 30 to 40% by weight of a recycled polyethylene resin, and 1 to 5% by weight of a recycled polystyrene resin;a high melt strength foamable polypropylene resin having a melt tension of at least 5 cN at 230° C.; andwater,wherein the paper pellet is 50 to 65% by weight, the recycled resin is 15 to 25% by weight, and the high melt strength foamable polypropylene resin is 10 to 30% by weight,the water is in a range of 10 to 20% by weight to the paper pellet, the recycled resin, and the high melt strength foamable polypropylene resin,the foamed product is formed by extruding charged materials from a die and passing the extruded materials between rollers to produce tightly connected surfaces of a plurality of rod-like elements,each of the rod-like elements has, on a surface thereof, a skin layer having no bubbles, the skin layer covering an inside foam layer,the skin layer is 15 to 25 μm in average thickness and exhibits an infrared absorption spectral waveform equivalent to that of the foam layer, andvoids are formed between the rod-like elements, the voids forming grooves on substantially planar exterior surfaces of the foamed product. 2. The foamed product according to claim 1, wherein the skin layer and the foam layer are made by uniformly mixing the recycled polypropylene resin and the high melt strength foamable polypropylene resin with the recycled polyethylene resin. 3. The foamed product according to claim 1, wherein said foamed product exhibits a bending strength of at least 0.058 MPa. 4. A method of manufacturing a foamed product by charging a paper pellet, a recycled resin, a high melt strength foamable polypropylene resin having a melt tension of at least 5 cN at 230° C., and water into an extruder and extruding charged materials from a die provided on an extrusion side of the extruder, the paper pellet being a mixture of a fine paper powder having a particle diameter of 20 to 200 μm, a hydrophilic macromolecule, and water, and the recycled resin being a mixture of a polyethylene resin, a polypropylene resin, and a polystyrene resin, wherein the paper pellet includes 35 to 50% by weight of a fine paper powder and 50 to 65% by weight of a hydrophilic macromolecule,the recycled resin includes 55 to 65% by weight of a recycled polypropylene resin, 30 to 40% by weight of a recycled polyethylene resin, and 1 to 5% by weight of a recycled polystyrene resin, 50 to 65% by weight of the paper pellet, 15 to 25% by weight of the recycled resin, 10 to 30% by weight of the high melt strength foamable polypropylene resin, and 10 to 20% by weight of the water are charged into the extruder,the paper pellet, the recycled resin, and the high melt strength foamable polypropylene resin are heat-kneaded in the extruder to form a high-temperature fluid, 10 to 20% by weight of the water is added to the high-temperature fluid to cause foaming, and a result of the foaming is extruded from the die to mold the foamed product, and upon extruding the result of the foaming from the die and passing the extruded materials between rollers, rod-like elements are each formed to have a skin layer without bubbles and a foam layer covered with the skin layer, where adjacent rod-like elements are tightly connected to each other in a molten state, the skin layer is 15 to 25 μm in average thickness and exhibits an infrared absorption spectral waveform equivalent to that of the foam layer, and voids are formed between the rod-like elements, the voids forming grooves on substantially planar exterior surfaces of the foamed product. 5. The method of manufacturing a foamed product according to claim 4, wherein said foamed product exhibits a bending strength of at least 0.058 MPa.
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