التفاصيل البيبلوغرافية
| العنوان: |
PROCESS FOR PREPARING INJECTION MOLDED PARTS WITH DECREASED GLASS FIBER READ OUT |
| Document Number: |
20120043700 |
| تاريخ النشر: |
February 23, 2012 |
| Appl. No: |
13/203522 |
| Application Filed: |
February 08, 2010 |
| مستخلص: |
The present invention relates to a process for preparing an injection molded part, comprising the following steps: a preparing a glass fiber reinforced polyamide-6 composition with a relative viscosity of less than 2.4; b heating a such composition to obtain a viscous liquid; c filling a mold cavity with the viscous liquid with a filling time of at least 0.8 s; d leaving the viscous liquid in the mold under pressure until it cools to form a part; e opening the mold; f ejecting the part; wherein the polyamide-6 composition has a crystallization temperature under hyper DSC conditions of less than 168° C. The invention also relates to an injection molded part a having a maximum wall thickness of at least 2.5 mm; and/or b a part weight of at least 100 g per injection point; wherein the part consists of a glass fiber reinforced semi-crystalline polyamide-6 composition having a relative solution viscosity of less than 2.4, wherein the polyamide-6 composition has a crystallization temperature under hyper DSC conditions of less than 168° C. |
| Inventors: |
Van Der Vegte, Eric Willem (AH Buchten, NL); Hoekstra, Johannes (AX Lieshout, NL); Rulkens, Rudy (CE Margraten, NL) |
| Claim: |
1. Process for preparing an injection molded part, comprising the following steps: a. preparing a glass fiber reinforced semi-crystalline polyamide-6 composition having a relative solution viscosity of less than 2.4 b. heating such composition to obtain a viscous liquid; c. filling a mold cavity with the viscous liquid with a filling time of at least 0.8 s; d. leaving the viscous liquid in the mold under pressure until it cools to form a part; e. opening the mold; f. ejecting the part; characterized in that the polyamide-6 composition has a crystallization temperature under hyper DSC conditions of less than 168° C. |
| Claim: |
2. Process according to claim 1, characterized in that the injection molded part has a maximum wall thickness of at least 2.5 mm, preferably at least 3.0 mm, more preferably at least 3.5 mm and most preferred at least 4.0 mm. |
| Claim: |
3. Process according to claim 1, characterized in that the polyamide-6 composition is obtained by melt-mixing a base polyamide and a low-molecular weight polyamide. |
| Claim: |
4. Process according to claim 1, characterized in that the polyamide-6 composition has a relative solution viscosity of less than 2.3. |
| Claim: |
5. Process according to claim 1, characterized in that the polyamide-6 composition has a relative solution viscosity of less than 2.2. |
| Claim: |
6. Process according to claim 1, characterized in that the polyamide-6 composition is obtained by melt-mixing 80-99.5 wt % of base polyamide and 0.5-20wt % of low-molecular weight polyamide and in which the total amount of base polyamide and the amount of low-molecular weight polyamide is 100%. |
| Claim: |
7. Process according to claim 1, characterized in that the base polyamide has a weight-average molecular weight of at least 10.000 g/mol and the low-molecular weight polyamide has a weight-average molecular weight of at most 5.000 g/mol. |
| Claim: |
8. Process according to claim 1, characterized in that the polyamide-6 composition comprises glass fibers in an amount of at least 10 wt %, preferably at least 20 wt %, more preferably at least 30 wt %, based on the total weight of the polyamide-6 composition. |
| Claim: |
9. Process according to claim 1, characterized in that the polyamide-6 composition comprises glass fibers in an amount of at most 60 wt %. |
| Claim: |
10. Process according to claim 1, characterized in that the polyamide-6 composition comprises a black polyaniline derivative. |
| Claim: |
11. Process according to claim 10, characterized in that the black polyaniline derivative is nigrosine. |
| Claim: |
12. Injection molded part obtained by the process according to claim 1, characterized that the weight of the part is at least 100 g per injection point. |
| Claim: |
13. Injection molded part a. having a maximum wall thickness of at least 2.5 mm; and/or b. a part weight of at least 100 g per injection point; wherein the part consists of a glass fiber reinforced semi-crystalline polyamide-6 composition having a relative solution viscosity of less than 2.4, characterized in that the polyamide-6 composition has a crystallization temperature under hyper DSC conditions of less than 168° C. |
| Current U.S. Class: |
26432/814 |
| Current International Class: |
29; 08 |
| رقم الانضمام: |
edspap.20120043700 |
| قاعدة البيانات: |
USPTO Patent Applications |