Multi-layer co-extrusion high-temperature-resistant BOPP (biaxially-oriented polypropylene) film and preparation method thereof

A multi-layer co-extrusion, high temperature resistant technology, used in chemical instruments and methods, layered products, flat products, etc., can solve the problems of bag breakage, wrinkling, air leakage, etc. Abrasion and heat shrinkage, high gloss effect

Pending Publication Date: 2022-05-06
安徽维龙新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, for the current biaxially oriented polypropylene film for packaging, the common quality problems are broken bags after high temperature heating (generally at 95-100°C), wrinkling, odor and air leakage after cooking.

Method used

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  • Multi-layer co-extrusion high-temperature-resistant BOPP (biaxially-oriented polypropylene) film and preparation method thereof
  • Multi-layer co-extrusion high-temperature-resistant BOPP (biaxially-oriented polypropylene) film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides a kind of multi-layer co-extruded high temperature resistant BOPP film, such as figure 1 As shown, the film sequentially includes an upper high temperature resistant layer 1, a core layer 2 and a lower high temperature resistant layer 3;

[0041] The thicknesses of the upper high temperature resistant layer 1 and the lower high temperature resistant layer 3 are independently 5 μm;

[0042] The thickness of the core layer 2 is 15 μm;

[0043] Based on the total weight of the upper high temperature resistant layer or the lower high temperature resistant layer, the raw materials of the upper high temperature resistant layer and the lower high temperature resistant layer each independently include: polyetherimide 43%, glass fiber 15%, Calcium silicate 5%, polypropylene copolymer 35%, pyromellitic dianhydride 0.6%, hydroxyethyl acrylate 0.6%, glass microspheres 0.7%, antioxidant 0.1%.

[0044] Based on the total weight of the core layer, the raw ma...

Embodiment 2

[0051] This embodiment provides a multi-layer co-extruded high temperature resistant BOPP film. The difference between this embodiment and Embodiment 1 is:

[0052] Based on the total weight of the upper high temperature resistant layer or the lower high temperature resistant layer, the raw materials of the upper high temperature resistant layer and the lower high temperature resistant layer each independently include: polyimide 30%, glass fiber 20%, silicon Calcium acid 15%, polypropylene copolymer 33%, pyromellitic dianhydride 0.6%, hydroxyethyl acrylate 0.6%, anti-glass beads 0.7%, antioxidant 0.1%.

Embodiment 3

[0054] This embodiment provides a multi-layer co-extruded high temperature resistant BOPP film. The difference between this embodiment and Embodiment 1 is:

[0055] Based on the total weight of the upper high temperature resistant layer or the lower high temperature resistant layer, the raw materials of the upper high temperature resistant layer and the lower high temperature resistant layer independently include: 55% polyvinylpyrrolidone, 5% glass fiber, silicic acid Calcium 5%, polypropylene copolymer 33%, pyromellitic dianhydride 0.5%, hydroxyethyl acrylate 0.5%, glass microspheres 0.5%, antioxidant 0.5%.

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Abstract

The invention belongs to the field of film preparation, and discloses a multi-layer co-extrusion high-temperature-resistant BOPP film and a preparation method thereof. The film sequentially comprises an upper high-temperature-resistant layer, a core layer and a lower high-temperature-resistant layer, based on the total weight of the upper high-temperature-resistant layer or the lower high-temperature-resistant layer, the raw materials of the upper high-temperature-resistant layer and the raw materials of the lower high-temperature-resistant layer respectively and independently comprise 20-55% of a high-temperature-resistant polymer, 5-25% of glass fibers, 1-15% of calcium silicate, 15-40% of co-polypropylene, 0.1-1.0% of a thermal curing agent, 0.1-1.0% of a cross-linking agent, 0.1-1.0% of an anti-adhesion agent and 0.3-0.5% of an antioxidant. The high-temperature-resistant polymer and the calcium silicate are compounded on the upper high-temperature-resistant layer and the lower high-temperature-resistant layer through a technology for preparing the film through multi-layer co-extrusion, so that the heat resistance of the BOPP film is greatly improved, and the prepared film has excellent mechanical strength, high wear resistance and high thermal shrinkage rate.

Description

technical field [0001] The invention belongs to the field of film preparation, and more specifically relates to a multi-layer co-extruded high temperature resistant BOPP film and a preparation method. Background technique [0002] Biaxially oriented polypropylene film (BOPP film) is a film product obtained by stretching polypropylene resin particles in a single or multi-layer co-extrusion into a sheet, and then stretched in both longitudinal and transverse directions. With high mechanical strength and physical stability, it is widely used as a packaging film for food, medicine and other products. It is mainly used in food, candy, cigarettes, tea, beverages, textiles, leather products and other product packaging. [0003] However, for the current biaxially oriented polypropylene film for packaging, the common quality problems are broken bag after high temperature heating (generally at 95-100°C), wrinkling, odor and air leakage after cooking. Therefore, the biaxially oriented...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/28B32B27/18B32B27/20B32B27/08B32B27/32B32B27/34B29D7/01B29C48/00B29C48/08B29C48/18B65D65/40
CPCB32B27/281B32B27/18B32B27/20B32B27/08B32B27/32B32B27/34B29D7/01B29C48/0018B29C48/08B29C48/18B65D65/40B32B2262/101B32B2307/306B32B2307/31B32B2307/554B32B2307/7246B32B2307/7244B32B2307/736B32B2553/00
Inventor 王武刚刘荣炽李春阳王宏霞
Owner 安徽维龙新材料科技有限公司
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