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Multi-layer plastic composite isolating sheet and production process thereof

A barrier material and sheet technology, applied in the direction of layered products, synthetic resin layered products, lamination, etc., can solve the problems of high price, high cost, complicated equipment, etc., and achieve low cost, both molding performance and barrier performance , The effect of simple production process

Active Publication Date: 2012-12-19
BRIGHT DAIRY & FOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to overcome the existence of multi-layer plastic composite barrier sheets suitable for the heat-treated fermented milk on-line forming-filling-capping production line in the prior art: the plastic sheet must meet the requirements of production equipment and production products , the selection of the corresponding barrier material, its composite structure design with the plastic sheet, and the requirement of easy tearability of the cover after the sheet is formed, resulting in its dependence on complex equipment and expensive multi-layer co-extrusion The preparation of sheet material machine equipment is costly and basically relies on the defects of imported goods, but provides a simple process, low cost, convenient and feasible, ideal effect, which can be produced by ordinary sheet material machines, and can be used for online forming-filling -Packaging of heat-treated fermented milk products in the capping production line, multi-layer plastic composite barrier sheet and its production process that can prolong the shelf life of products

Method used

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  • Multi-layer plastic composite isolating sheet and production process thereof
  • Multi-layer plastic composite isolating sheet and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The schematic diagram of the structure of the multi-layer plastic composite barrier sheet in this embodiment is as follows figure 1 with figure 2 shown.

[0055] Such as figure 1 As shown, the multi-layer plastic composite barrier sheet includes a substrate layer 1 , an adhesive layer 2 and an inner film layer 3 , and the substrate layer 1 and the inner film layer 3 are bonded together through the adhesive layer 2 .

[0056] Substrate layer 1: High-impact polystyrene (HIPS) is Dow Chemical, model 484H; general-purpose polystyrene (GPPS) is Dow Chemical, model 666H; color masterbatch is PolyOne color masterbatch, white food grade;

[0057] Wherein, the substrate layer 1 is a polystyrene sheet, the mass ratio is HIPS:GPPS:white masterbatch=70:28:2, and the thickness is 1000 μm.

[0058] Adhesive layer 2: the hot melt adhesive is German Henkel, type EVA; the thickness is 30 μm.

[0059] Intima layer 3: the thickness is 150 μm;

[0060] Such as figure 2 As shown, th...

Embodiment 2

[0073] The difference between this example and Example 1 is that the mass ratio of materials in the polystyrene sheet as the material of the substrate layer 1 is HIPS:GPPS:white masterbatch=30:65:5, and the thickness is 800 μm.

[0074] The inner film layer 3 is a five-layer co-extruded film with a total thickness of 200 μm, and the barrier material layer 33 is polyvinylidene chloride (PVDC) sourced from Dow, model SARAN.

[0075] The first adhesive resin layer 32 and the second adhesive resin layer 34 are Bynel 3860 adhesive resin, which comes from DuPont, USA.

[0076] After testing the performance of the product of this embodiment is as follows:

[0077] Tensile strength (longitudinal and horizontal) 20MPa; peel strength (vertical and horizontal, substrate and inner film layer) 15.0N / 15mm; heating dimensional change rate, longitudinal -2.5%, transverse 0; sheet oxygen transmission rate 1.4cm 3 / m 2 .24h.atm; Formed empty cup oxygen transmission rate 0.30cm 3 / pkg.day (me...

Embodiment 3

[0079] The difference between this embodiment and embodiment 1 is:

[0080] Substrate layer 1: High-impact polystyrene (HIPS) is Yangzi BASF's model 476L; general-purpose polystyrene (GPPS) is Dow Chemical, model 666H; color masterbatch is PolyOne color masterbatch, white food grade ;

[0081] Wherein, the substrate layer 1 is a polystyrene sheet, the mass ratio is HIPS:GPPS:white masterbatch=60:20:1, and the thickness is 800 μm.

[0082] Adhesive layer 2: the hot melt adhesive is German Henkel, type EVA; the thickness is 30 μm.

[0083] Intima layer 3: the thickness of the intima layer is 100 μm;

[0084] Material A layer 31 is (ethylene-vinyl acetate) copolymer (the source is DuPont Easy, model 3175);

[0085] The first adhesive resin layer 32 is adhesive resin, the source is DuPont Bynel, and the model is Bynel 4157;

[0086] The barrier material layer 33 is (ethylene / vinyl alcohol) copolymer (EVOH), sourced from Kuraray, Japan, model EVALJ171B, with a thickness of abou...

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Abstract

The invention discloses a multi-layer plastic composite isolating sheet and a production process thereof. The multi-layer plastic composite isolating sheet comprises a base material layer, a bonding layer and an inner film layer, wherein the base material layer and the inner film layer are bonded through the bonding layer; the base material layer is made from a polystyrene sheet; the polystyrene sheet is formed by blending high-impact resistant polystyrene and universal polystyrene; the inner film layer is a multi-layer co-extruded thin film which contains an isolating material layer; and an isolating material in the isolating material layer is a (ethylene / vinyl alcohol) copolymer or polyvinylidene chloride. The multi-layer plastic composite isolating sheet can be produced by an ordinary sheet machine, is simple in process, low in cost, convenient to use, feasible and ideal in effect, can be applied to packaging of thermal treatment fermented milk products of an online molding-filling-seal capping production line and can prolong the shelf life of the products.

Description

technical field [0001] The invention relates to a multi-layer plastic composite barrier sheet and its production process. Background technique [0002] Plastic sheets are commonly used in plastic packaging production enterprises to produce plastic products of various shapes such as cups, plates, and saucers, as well as in food and pharmaceutical production enterprises for online thermoforming-filling-capping production lines. At present, the thermoforming sheets used in the forming-filling-capping production line for cup packaging are mainly polystyrene (PS) sheets, polyvinyl chloride (PVC) sheets and polypropylene (PP) sheets. . Among them, polystyrene (PS) sheets are mainly used for packaging of products filled at room temperature, polyvinyl chloride (PVC) sheets are mainly used for pharmaceutical blister packaging, and polypropylene (PP) sheets are mainly used for packaging of high-temperature filling products. . The common feature of these sheets is poor barrier prope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B7/12B32B27/30C08L25/06C08L51/04C08L23/08C08L27/08C08L23/04B32B37/12
Inventor 刘向红张薇蓉贾增芹
Owner BRIGHT DAIRY & FOOD
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