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公开(公告)号：US20220161459A1
公开(公告)日：2022-05-26
申请号：US17599687
申请日：2019-03-29
Applicant: Dow Global Technologies LLC , Dow Silicones Corporation
Inventor： Wenyi Huang , Nicholas J. Horstman , Jeffrey D. Wenzel , Qian Gou , Yabin Sun , Mohamed Esseghir , Yunfeng Yang , Yonghua Gong , Weiming Ma , Jeffrey M. Cogen , Hong Yang
Abstract: The present disclosure provides a pellet. In an embodiment, the pellet includes a body having a first end and an opposing second end. The body is composed of a polymeric material. The body has a length and a diameter (body diameter). A channel having a diameter (channel diameter), extends through the body from the first end to the second end. The pellet has a channel diameter-to-body diameter ratio from 0.05 to 0.45. The present disclosure also provides a process for soaking the pellet in a liquid additive and forming a loaded pellet with the additive in the pellet body.
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公开(公告)号：US20220193956A1
公开(公告)日：2022-06-23
申请号：US17599368
申请日：2019-03-29
Applicant: Dow Global Technologies LLC , DOW SILICONES CORPORATION
Inventor： Wenyi Huang , Nicholas J. Horstman , Jeffrey D. Wenzel , Qian Gou , Yabin Sun , Mohamed Esseghir , Yunfeng Yang , Yonghua Gong , Weiming Ma , Hong Yang
Abstract: A die assembly (5) including: (i) a die plate (10) having an inlet surface (15) and an opposing discharge surface (35); (ii) an inlet (30) on the inlet surface (15) and a first axis of symmetry (A) extending through the inlet (30) and perpendicular to the inlet surface (15); (iii) a discharge port (45) on the discharge surface (35) and a second axis of symmetry (B) extending through the discharge port (45) and perpendicular to the discharge surface (35). The first and second axes are apart from, and parallel to, one another. The die assembly (5) includes (iv) an extrudate passage (42) fluidly connecting the inlet (30) and the discharge port (45). A third axis of symmetry (C) extends through the extrudate passage (42). The die assembly (5) includes (v) a nozzle (100) mounted in the die plate (10), the nozzle (100) having an injection tip (110) in the extrudate passage (42) at the discharge port (45); and (vi) the third axis of symmetry (C) intersects the first axis of symmetry (A) to form an acute angle.
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公开(公告)号：US12138828B2
公开(公告)日：2024-11-12
申请号：US17599687
申请日：2019-03-29
Applicant: Dow Global Technologies LLC , Dow Silicones Corporation
Inventor： Wenyi Huang , Nicholas J. Horstman , Jeffrey D. Wenzel , Qian Gou , Yabin Sun , Mohamed Esseghir , Yunfeng Yang , Yonghua Gong , Weiming Ma , Jeffrey M. Cogen , Hong Yang
Abstract: The present disclosure provides a pellet. In an embodiment, the pellet includes a body having a first end and an opposing second end. The body is composed of a polymeric material. The body has a length and a diameter (body diameter). A channel having a diameter (channel diameter), extends through the body from the first end to the second end. The pellet has a channel diameter-to-body diameter ratio from 0.05 to 0.45. The present disclosure also provides a process for soaking the pellet in a liquid additive and forming a loaded pellet with the additive in the pellet body.
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公开(公告)号：US20160177473A1
公开(公告)日：2016-06-23
申请号：US14905869
申请日：2014-09-19
Applicant: DOW GLOBAL TECHNOLOGIES LLC
Inventor： Mark A. Spalding , Weijun Wang , Calvin L. Pavlicek , Nicholas J. Horstman
CPC classification number: D01F6/30 , B29C48/0018 , B29C48/022 , B29C48/05 , B29K2023/00 , B29L2031/707 , D01D5/098 , D01D5/16 , D01F9/21 , D01F11/06 , D06M11/52 , D06M11/55
Abstract: Prepare a polyolefin fiber having a diameter of 10 microns or less by extruding a molten polyolefin through die holes having diameters in a range of 250 to 500 microns to produce molten polyolefin fibers; drawing the molten polyolefin fibers to achieve a molten draw ratio in a range of 150 to 500 at a temperature in a range of 200 to 250 degrees Celsius; and drawing the polyolefin fibers in a solid state to achieve a solid state draw ratio of 3.0 to 4.0 at a temperature in a range of 40 to 100 degrees Celsius to produce polyolefin fibers having a diameters of 10 microns or less; where the polyolefin is characterized by being a polyolefin copolymer of ethylene and one or more than one alpha-olefin and where the copolymer has a solid density of 0.870 or more and 0.96 or less as determined according to ASTM D792.
Abstract translation: 通过将熔融聚烯烃挤出直径在250-500微米范围内的模具孔，制备直径为10微米或更小的聚烯烃纤维，以制备熔融聚烯烃纤维; 拉伸熔融的聚烯烃纤维以在200至250摄氏度的温度范围内实现150至500的范围内的熔融拉伸比; 并且将聚烯烃纤维拉伸成固态，以在40至100摄氏度的温度下实现3.0至4.0的固态拉伸比，以制备直径为10微米或更小的聚烯烃纤维; 其中聚烯烃的特征在于是乙烯和一种或多于一种α-烯烃的聚烯烃共聚物，其中根据ASTM D792测定，共聚物的固体密度为0.870以上且0.96以下。
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