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Transparent moulds made from polyamide moulding material

A technology for polyamide molding and molding, which is used in the field of transparent moldings to achieve the effects of high dynamic load capacity, good heat resistance and high rigidity

Active Publication Date: 2008-06-11
艾曼斯(苏州)工程塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is known from US 7,014,315 that polycarbonate, PMMA, CR39 (a hard plastic based on diethylene glycol (bis)allyl carbonate) and glass cannot meet these requirements in a satisfactory manner

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] 1) General Manufacturing Instructions

[0036] The invention is described in more detail below on the basis of examples and experimental results, but the invention is not limited to the specific features indicated.

[0037] Polyamides are prepared in a generally known manner in a known stirrable autoclave with receiving vessel and reaction vessel:

[0038] Place deionized water in a receiving vessel and add monomer and additives. It was then inertized several times with nitrogen. While stirring, it is heated to 180-230° C. under the pressure generated to obtain a homogeneous solution. The solution is pumped through a screen into the reaction vessel, which is then heated to the desired reaction temperature of 270-310° C. at a maximum pressure of 30 bar. During the pressure phase, the preparation is kept at the reaction temperature for 2-4 hours. During the subsequent expansion stage, the pressure is reduced to atmospheric pressure over 1-2 hours, ...

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PUM

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Abstract

The present invention relates to a transparent mould product and the usage thereof, the mould product is made from special polyamide molding material and the transparence is at least 88% when the layer thickness is 2mm.

Description

technical field [0001] The present invention relates to transparent moldings made of selected polyamide molding materials whose physical properties, especially transparency and dynamic load resistance, are superior to those of polycarbonate. The moldings of the invention achieve, to a certain extent, multiple bending cycles at higher stresses than polycarbonate without damaging the moldings. Background technique [0002] Transparent moldings made of polyamide or polycarbonate are known in the prior art. For specific applications, such as lenses for rimless spectacles, polycarbonate is often used, where the lenses have screw holes eg for attachment to temples and bridges. [0003] However, under dynamic bending loads, mechanical stress cracks that can lead to lens breakage develop at these connections, especially in the case of polycarbonate. [0004] In order to manufacture rimless eyeglasses, various structures are described in the literature to fasten the temples and bri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/00C08L77/06C08L77/02G02B1/04G02B1/10G02C7/00
CPCG02B1/04C08L77/06C08G69/265C08G69/36C08G69/26C08L77/02B29C33/38
Inventor 弗里德里克·塞韦林·布勒克里斯蒂安·里特卡
Owner 艾曼斯(苏州)工程塑料有限公司
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