Sinterable semi-crystalline powder and near-fully dense article

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

156 622, 264122, 264125, 521145, 521919, 523201, 528310, C08G 6914

Patent

active

059902680

ABSTRACT:
A laser-sinterable powder product has been prepared having unique properties which allow the powder to be sintered in a selective laser sintering machine to form a sintered part which is near-fully dense. For most purposes, the sintered part is indistinguishable from another part having the same dimensions made by isotropically molding the powder. In addition to being freely flowable at a temperature near its softening temperature, a useful powder is disclosed that has a two-tier distribution in which substantially no primary particles have an average diameter greater than 180 .mu.m, provided further that the number average ratio of particles smaller than 53 .mu.m is greater than 80%, the remaining larger particles being in the size range from 53 .mu.m to 180 .mu.m. A powder with slow recrystallization rates, as evidenced by non-overlapping endothermic and exothermic peaks in their differential scanning calorimetry characteristics for scan rates of on the order of 10.degree. C. to 20.degree. C. per minute, will also result in sintered parts that are near-fully dense, with minimal dimensional distortion.

REFERENCES:
patent: Re28361 (1975-03-01), Hahn
patent: 3591409 (1971-07-01), Aubrey et al.
patent: 4247508 (1981-01-01), Housholder
patent: 4863538 (1989-09-01), Deckard
patent: 4938816 (1990-07-01), Beaman et al.
patent: 4944817 (1990-07-01), Bourell et al.
patent: 5017317 (1991-05-01), Marcus
patent: 5034432 (1991-07-01), Ueno et al.
patent: 5063183 (1991-11-01), Taniguchi et al.
patent: 5076869 (1991-12-01), Bourell et al.
patent: 5132143 (1992-07-01), Deckard
patent: 5155324 (1992-10-01), Deckard et al.
patent: 5182170 (1993-01-01), Marcus et al.
patent: 5185108 (1993-02-01), Shimandle
patent: 5304329 (1994-04-01), Dickens, Jr. et al.
patent: 5342919 (1994-08-01), Dickens, Jr. et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Sinterable semi-crystalline powder and near-fully dense article does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sinterable semi-crystalline powder and near-fully dense article , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sinterable semi-crystalline powder and near-fully dense article will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1223159

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.