A kind of unstretched micro-foamed polypropylene film

A polypropylene film and micro-foaming technology, which is applied in the field of packaging plastic film, can solve the problems of film transparency, tear strength, poor heat-sealing performance, heat-sealing wrinkling, etc., and achieve excellent heat-sealing performance, heat-sealing The effect of strong performance and low production cost

Active Publication Date: 2018-08-24
安徽双津实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of manufacturing process, polypropylene resin is used as the main raw material, and an appropriate amount of calcium carbonate and pearlescent pigments are added for blending, co-extrusion, and stretching to form an oriented film with micropores inside, that is, OPP pearlescent film. The film also has certain application limitations. On the one hand, the heat-sealing performance is poor, and the heat-sealing wrinkling and other undesirable phenomena are caused by the deorientation of the stretched oriented film; on the other hand, the transparency is poor, and calcium carbonate is used as the bubble nucleus. It has a great influence on the transparency and tear strength of the film

Method used

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  • A kind of unstretched micro-foamed polypropylene film
  • A kind of unstretched micro-foamed polypropylene film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 As shown, for the unstretched micro-foamed polypropylene film, the corona layer 1 raw material is 100wt% random copolymer polypropylene with a thickness of 16 μm; the micro-foamed layer 2 raw material is 70wt% isotactic homopolypropylene , a blend of 10wt% polyolefin elastomer and 20wt% foaming masterbatch, with a thickness of 48 μm; the raw material of heat-sealing layer 3 is a blend of 97wt% binary copolymerized polypropylene and 3wt% anti-sticking agent, with a thickness of 16 μm . The three layers of raw materials are melted and extruded by three extruders respectively, extruded through a T-shaped die distributor to a casting chill roll, cast into a sheet, and then subjected to thickness control, corona treatment, winding, aging treatment, Slitting process to finally obtain the finished unstretched micro-foamed polypropylene film, the total thickness of the film is 80 μm; the foam masterbatch is made of the following components in parts by weight: ...

Embodiment 2

[0019] Such as figure 1 As shown, the unstretched micro-foamed polypropylene film, the raw material of the corona layer 1 is 100wt% isotactic homopolypropylene, and the thickness is 15 μm; the raw material of the micro-foamed layer 2 is 67wt% isotactic homopolypropylene. A blend of propylene, 10wt% polyolefin elastomer and 23wt% foaming masterbatch, with a thickness of 70 μm; the raw material of the heat-sealing layer 3 is a blend of 95wt% binary copolymerized polypropylene and 3wt% anti-sticking agent, with a thickness of 15 μm. The three layers of raw materials are melted and extruded by three extruders respectively, extruded through a T-shaped die distributor to a casting chill roll, cast into a sheet, and then subjected to thickness control, corona treatment, winding, aging treatment, Slitting process to finally obtain the finished unstretched micro-foamed polypropylene film with a total film thickness of 100 μm; the foam masterbatch is made of the following components in...

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Abstract

The invention belongs to the technical field of plastic films for package, and specifically relates to an undrawn micro-foaming polypropylene film. The undrawn micro-foaming polypropylene film is manufactured by three layer structures: a corona layer, a micro-foaming layer and a heat-seal layer. The micro-foaming polypropylene film has a pearl effect without adding pearl masterbatch, is good in transparence, strong in heat-seal performance, simple in production process, and low in production cost.

Description

technical field [0001] The invention belongs to the technical field of packaging plastic films, in particular to an unstretched micro-foamed polypropylene film. Background technique [0002] Pearlescent film shows good visual effects and excellent decoration due to its colorful pearl luster, and is widely used as commodity packaging materials and production of commodity labels, signs, etc. In terms of manufacturing process, polypropylene resin is used as the main raw material, and an appropriate amount of calcium carbonate and pearlescent pigments are added for blending, co-extrusion, and stretching to form an oriented film with micropores inside, that is, OPP pearlescent film. The film also has certain application limitations. On the one hand, the heat-sealing performance is poor, and the heat-sealing wrinkling and other undesirable phenomena are caused by the deorientation of the stretched oriented film; on the other hand, the transparency is poor, and calcium carbonate is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B27/18C08L23/12C08L23/14C08L23/08C08L23/28C08K5/09C08K3/22C08K5/42C08J9/08C08J9/10C08K3/34
CPCB32B5/18B32B27/32B32B2266/025B32B2307/412B32B2307/558C08J9/08C08J9/103C08J2203/02C08J2203/04C08J2323/12C08K3/34C08K2201/014C08L23/12C08L2205/035C08L2207/10C08L23/0853C08L23/286C08K5/09C08K2003/2241C08K5/42C08L23/14
Inventor 唐健王帮新张治国张复宝
Owner 安徽双津实业有限公司
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