Abstract Granules containing 60 wt. % or more filler, having such particle size distribution that 90 wt. % or more granular particles have a particle size of (1/3)d50b to 3d50b (d50b: mean particle size of the granules), and being produced by blending (a) 60 to 90 parts by weight of a filler having a mean particle size of 0.05 to 100 mu , (b) 5 to 35 parts by weight of crystalline polyolefin powder having a mean particle size (d50a) of 150 to 1,000 mu and having such particle size distribution that 90 wt. % or more particles thereof have a particle size of (1/2)d50a to 2d50a, (c) 5 to 35 parts by weight of a binder having a melting point lower than that of said crystalline polyolefin powder by a least 10 DEG C., and optionally, (d) a compounding additive, at a temperature lower than the melting point of the crystalline polyolefin powder and higher than the melting point of the binder, is disclosed.
Granules containing 60 wt% or more of a filler, 90 wt% or more of said granules having a particle size of (1/3)d 50 b to 3d 50 b , wherein granules, said granules being produced by blending at least (a) 60 to 90 parts by weight of a filler having a mean particle size of 0.05 to 100μ, (b) 5 to 35 parts by weight of a crystalline polyolefin powder having a mean particle size (d 50 a ) of 150 to 1,000μ, 90 wt% or more of the particles thereof having a particle size of (1/2)d 50 a to 2d 50 a , and (c) 5 to 35 parts by weight of a binder having a melting point lower than that of said crystalline polyolefin powder by at least 10° C. at a temperature lower than the melting point of the crystalline polyolefin powder and higher than the melting point of the binder.
Claim 2
Dependent Claim
154 words
Granules containing 60 wt% or more of a filler, 90 wt% or more of said granules having a particle size of (1/3)d 50 b to 3d 50 b , wherein granules, said granules being produced by blending at least (a) 60 to 90 parts by weight of a filler having a mean particle size of 0.05 to 100μ, (b) 5 to 35 parts by weight of a crystalline polyolefin powder having a mean particle size (d 50 a ) of 150 to 1,000μ, 90 wt% or more of the particles thereof having a particle size of (1/2)d 50 a to 2d 50 a , and (c) 5 to 35 parts by weight of a binder having a melting point lower than that of said crystalline polyolefin powder by at least 10° C. at a temperature lower than the melting point of the crystalline polyolefin powder and higher than the melting point of the binder.
Claim 3
Dependent Claim
19 words
Granules as claimed in claim 1, wherein the filler particles have a mean particle size from 0.05 to 50μ.
Claim 4
Dependent Claim
25 words
Granules as claimed in claim 1, wherein the weight ratio of the binder to the filler is within the range of from 0.05/1.0 to 0.4/1.0.
Claim 5
Dependent Claim
24 words
Granules as claimed in claim 3, wherein the ratio of the binder to the filler is within the range of from 0.05/1 to 0.25/1.
Claim 6
Dependent Claim
13 words
Granules as claimed in claim 1, wherein the binder is an olefinic polymer.