Radiation-absorbing material

An absorber and radiation absorption technology, applied in the field of radiation-absorbing materials, can solve problems such as thermal instability

Active Publication Date: 2012-02-01
CHEM FAB BUDENHEIM AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Organic absorbent materials often have the disadvantage that they are thermally unstable and decompose during processing into polymeric materials or further processing, which often occurs in the molten or thermally softened state at temperatures generally exceeding 200°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 1% by weight of basic copper phosphate (CHP) (average particle size d50 = 2.27 microns) was added to the granular PP material. The resulting mixture was fed into a heatable kneader [Brabender Plastograph]. This uniformly distributes the absorbent material in the molten polymer material or becomes incorporated into the material.

[0059] The plastic-based material thus obtained was shaped into a sheet having a thickness of 500 µm. The radiation absorption of the flakes was measured with a spectrophotometer (Varian Cary 5000). Complete absorption of radiation is measured in the UV region below 380 nm. In addition, in the region of 800 nanometers and above (near-infrared region), the light transmittance is less than 0.03, that is to say, almost complete absorption is measured here. In the visible light wavelength region, the light transmittance is >0.50, so the absorber material has no substantial damage to it.

Embodiment 2

[0061] 1% by weight of copper pyrophosphate and 1% by weight of copper orthophosphate were added to the granular PE material. Incorporate copper phosphate compounds into plastics by extrusion and distribute them evenly.

[0062] The polymer material thus obtained was shaped into a sheet having a thickness of 600 micrometers. The radiation absorption of the flakes was measured with a spectrophotometer (Varian Cary 5000). In the UV region below 400 nm, very high radiation absorption (transmittance < 0.10) was measured for copper-added phosphate flakes.

[0063] In addition, in the region of 850 nanometers and above (near infrared region), the light transmittance is less than 0.1. As desired, the transparency in the visible wavelength region is high (transmittance about 0.8).

Embodiment 3

[0065] 1% by weight of CHP (copper basic phosphate) was added to the granular PET material. Incorporate basic copper phosphate into plastics by extrusion and distribute it evenly.

[0066] The polymer material thus obtained was shaped into a sheet having a thickness of 600 micrometers. The radiation absorption of the flakes was measured with a spectrophotometer (Varian Cary 5000). In the UV region below 400 nm, a very high radiation absorption of more than 90% was measured. In addition, in the region of 850 nanometers and above (near infrared region), the light transmittance is less than 0.1.

[0067] As desired, the transparency in the visible wavelength region is high (transmittance > 0.80).

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Abstract

The invention relates to a radiation-absorbing, plastic-based material composed of a polymer matrix having an absorber material or mixture of absorber materials contained therein, wherein the absorber material or mixture of absorber materials is selected from among phosphates, condensed phosphates, phosphonates, phosphites, and mixed hydroxide / phosphate oxoanions of copper (Cu), tin (Sn), calcium (Ca), and / or iron (Fe) and is present in the polymer matrix in a finely distributed, dispersed, or dissolved manner.

Description

technical field [0001] The invention relates to a plastic-based radiation-absorbing material consisting of at least one polymer matrix and an absorber material or absorber material mixture contained in the matrix. Background technique [0002] All types of goods, such as food, often have packaging that consists entirely or partly of polymeric materials (plastics). Often, packaging bundles or holds together several individual products or many different products or product parts. Liquid food such as beverages, oils, soups, canned fruit and liquids containing vegetables, and non-food liquids such as household cleaning and care products, pharmaceuticals, motor oil and many others are packaged in plastic containers such as bottles, cartridges and cans Target market. Besides preserving the product, another important reason to use packaging is to protect the product from dust, damage, etc. Packaging is often partially or completely transparent, allowing the product contained wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/00C08K3/00C08K3/32
CPCC08K5/0008C08J5/18C08K3/32C08K2003/321Y10T428/269C08L23/06C08L23/12C08L67/02
Inventor H·韦姆特R·维森博斯基T·扬森
Owner CHEM FAB BUDENHEIM AG
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