阅读说明：本技术 热塑性模塑组合物 (Thermoplastic molding composition ) 是由 J·克勒梅 S·瓦格纳 于 2020-02-19 设计创作，主要内容包括：本发明涉及玻璃纤维用于增加由包含热塑性聚酰胺的模塑组合物制成的模塑体的熔接线强度的用途,所述玻璃纤维根据DIN ISO 527-5的拉伸强度为86.0至92.0GPa,根据DIN ISO 527-5的弹性E模量为2600至3200MPa且根据DIN ISO 7884-1的软化点为900℃至950℃。(The invention relates to the use of glass fibers having a tensile strength of 86.0 to 92.0GPa according to DIN ISO527-5, an E-modulus of elasticity of 2600 to 3200MPa according to DIN ISO527-5 and a softening point of 900 to 950 ℃ according to DIN ISO7884-1 for increasing the weld line strength of molded bodies made of molding compositions comprising thermoplastic polyamides.)

1. Use of glass fibers having a tensile strength according to DIN ISO527-5 of 86.0 to 92.0GPa, a tensile modulus of elasticity according to DIN ISO527-5 of 2600 to 3200MPa and a softening point according to DIN ISO7884-1 of 900 ℃ to 950 ℃ for increasing the weld mark strength of a shaped article made of a molding material comprising a thermoplastic polyamide.

2. Use according to claim 1, wherein the glass fibers have the following composition:

B1)55.5 to 62.0% by weight of SiO₂，

B2)14.0 to 18.0 wt.% of Al₂O₃，

B3)11.0 to 16.0 wt% CaO,

B4)6.0 to 10.0% by weight of MgO,

B5)0 to 4.0% by weight of other oxides,

wherein the sum of the proportions of B3) CaO and B4) MgO is from 17.0% by weight to 24.0% by weight and the sum of the percentages by weight of B1) to B5) is 100% by weight.

3. Use according to claim 1 or 2, wherein the thermoplastic polyamide is selected from polyamide 6, polyamide 66, polyamide 6.10, polyamide 6T/6I, polyamide 6T/6, polyamide 6T/66 and copolymers or mixtures thereof.

4. A thermoplastic molding material comprising:

a) from 30.0 to 90.0% by weight of at least one thermoplastic polyamide as component A),

b)10.0 to 70.0% by weight of glass fibers as component B), the glass fibers having a tensile strength according to DIN ISO527-5 of 86.0 to 92.0GPa, a tensile modulus of elasticity according to DIN ISO527-5 of 2600 to 3200MPa, a softening point according to DIN ISO7884-1 of 900 to 950 ℃,

c) as component C) from 0 to 3.0% by weight of at least one heat stabilizer,

d) from 0% to 30.0% by weight of further additives and processing aids as component D),

wherein the sum of the percentages by weight of components A) to D) is 100% by weight.

5. A moulding material according to claim 4, wherein the material uses component B) with the following composition:

B1)55.5 to 62.0% by weight of SiO₂，

B2)14.0 to 18.0 wt.% of Al₂O₃，

B3)11.0 to 16.0 wt% CaO,

B4)6.0 to 10.0% by weight of MgO,

B5)0 to 4.0% by weight of other oxides,

wherein the sum of the proportions of B3) CaO and B4) MgO is from 17.0% by weight to 24.0% by weight and the sum of the percentages by weight of B1) to B5) is 100% by weight.

6. A molding material as claimed in claim 4 or 5, wherein component D) comprises carbon black and a lubricant.

7. A molding material as claimed in any of claims 4 to 6, wherein component C) is used in an amount of from 0.01 to 3.0% by weight, preferably from 0.02 to 2.0% by weight, particularly preferably from 0.05 to 1.0% by weight.

8. Thermoplastic molding material according to any of claims 4 to 7, wherein component B) is selected from the group consisting of polyamide 6, polyamide 66, polyamide 6.10, polyamide 6T/6I, polyamide 6T/6, polyamide 6T/66 and copolymers or mixtures thereof.

9. A molding material as claimed in any of claims 4 to 8, wherein component B) is used in an amount of from 15.0 to 55.0% by weight, preferably from 20.0 to 40.0% by weight, preferably from 25.0 to 35.0% by weight.

10. A process for preparing a thermoplastic molding material according to any of claims 4 to 9 by mixing components A), B) and optionally C) and D).

11. Use of the thermoplastic molding materials according to any of claims 4 to 9 for producing fibers, films and shaped articles.

12. A fiber, film or shaped article prepared from the thermoplastic molding material of any of claims 4 to 9.

13. A process for preparing a fiber, film or shaped article according to claim 11 by extrusion, injection molding or blow molding of a thermoplastic molding material according to any of claims 4 to 9.

Examples

The following raw materials were used:

polyamide 6: from BASF SEB27, melting point: viscosity number (in 96% H) at 220 ℃₂SO₄0.5% in solution): 150mL/g, amino end group: 37mmol/kg ECR glass fiber: standard E-Glass NEG ChopVantage 3610HP (diameter: 10 μm)

High-strength glass fiber: consists of the following components: SiO 2₂: 60.8 wt.% of Al₂O₃: 15.2 wt%, MgO: 6.8 wt%, CaO: 15.5 wt.% Na₂O: 0.8 wt%; treating with a silane glue suitable for bonding PA; diameter: 10 μm

A stabilizer: from BASF SE1098 (Heat stabilizer)

Carbon black: printex 60 from Orion Engineered Carbons GmbH

Lubricant: ethylene Bis Stearamide (EBS) from Lonza Cologne GmbH

The molding materials were prepared by mixing the following ingredients in a twin-screw extruder ZE 25A UTXi at a temperature of 260 ℃. The properties specified in table 1 below were determined by specified standards valid in 2019. The proportions of the ingredients are reported in weight%.

The obtained granular material was injection molded on an injection molding machine at a melting temperature of 290 ℃ to obtain standard ISO dumbbells and evaluated by visual inspection and analysis. The production of a standard ISO dumbbell having a thickness of 4mm and a length of 150mm was carried out by injection points arranged opposite to each other at the ends of the dumbbell so that the polyamide flowed in from the outside flowed into the middle of the dumbbell, forming weld marks in the middle of the molded article.

Weld mark strength was determined by standardized brake pressure testing. The mechanical properties were determined in accordance with DIN ISO527 or 179-2/1eU or 179-2/1eAf (2019 version). The amounts reported in the table are in weight%.

TABLE 1