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A kind of production process of pvc/pe/pvdc composite sheet

A production process and composite sheet technology, applied to synthetic resin layered products, layered products, devices for coating liquid on the surface, etc., can solve problems such as insufficient charge, discounted effective performance, and concave appearance of finished products, and achieve Good anti-seepage, improve production efficiency, good coating effect

Active Publication Date: 2015-09-23
杭州塑料工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual application process, after the ordinary PVC / PE composite material is filled with liquid preparations, because some liquids are highly volatile, they will volatilize after a period of storage, resulting in insufficient charge, and the appearance of the finished product is sunken inward, making the medicine The effective performance of the

Method used

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  • A kind of production process of pvc/pe/pvdc composite sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] refer to figure 1 , a production process of PVC / PE / PVDC composite sheet, comprising the following steps:

[0033] (1) PVC hard sheet unwinding: the unwinding brake air pressure is controlled at 0.5~3.0bar, and the thickness of PVC hard sheet is 0.25±0.015mm or 0.20±0.01mm;

[0034] (2) The first adhesive coating: apply the first adhesive on the upper surface of the PVC hard sheet and dry it in a drying tunnel at 50-85°C with a tension of 200-380N;

[0035] The amount of gluing is controlled at 3~5g / m 2 , the relative speed of the PVC hard sheet is 40-50m / min, the speed of the coating roller and the metering roller is controlled at 100-130% of the speed of the PVC hard sheet, the solid content of the adhesive is 30-50%, and the viscosity is Tu-4 cup 10-20 second; the first adhesive adopts UK3640 / UK6800 two-component polyurethane adhesive, the solid content of UK3640 adhesive is 60%, and the solid content of UK6800 adhesive is 99.5%; the first adhesive is prepared by et...

Embodiment 2

[0065] refer to figure 1 , a production process of PVC / PE / PVDC composite sheet, comprising the following steps:

[0066] (1) PVC hard sheet unwinding: the unwinding brake air pressure is controlled at 2.2bar, and the thickness of PVC hard sheet is 0.20mm;

[0067] (2) The first adhesive coating: apply the first adhesive on the upper surface of the PVC hard sheet and dry it in a drying tunnel at 65°C with a tension of 260N;

[0068] The amount of gluing is controlled at 4g / m 2 , the relative speed of PVC hard sheet is 45m / min, and the speed of coating roller and metering roller is controlled at 110% of the speed of PVC hard sheet, and the solid content of adhesive is 35%, and the viscosity is coated with -4 cups for 17 seconds; the first adhesive adopts UK3640 / UK6800 two-component polyurethane adhesive, the solid content of UK3640 adhesive is 60%, and the solid content of UK6800 adhesive is 99.5%; the first adhesive is prepared with ethyl acetate solvent;

[0069] (3) PE fil...

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Abstract

The invention relates to a production technology of a polyvinyl chloride (PVC) / polyethylene (PE) / polyvinyl dichloride (PVDC) composite piece. The technology comprises the steps of unwinding a hard PVC piece, coating an adhesive for a first time, unwinding a PE film, compounding PVC / PE, cooling a PVC / PE composite piece, winding, curing, unwinding the PVC / PE composite piece, trimming, carrying out corona treatment, coating the adhesive for a second time, coating PVDC, drying, cooling, winding, curing the PVC / PE / PVDC composite piece, slitting, checking, packaging, putting in storage and the like. According to the production technology of the PVC / PE / PVDC composite piece, a coating system provided with double coating heads is adopted, thus a coating effect is good and the production efficiency is greatly improved. Automatic connection can be realized among material rolls, so that the stop operation is not needed; the PVDC with high barrier property is compounded on the PVC / PE composite material and has very good effects of preventing seepage and volatilization for agents in a package, so that the PVC / PE / PVDC composite piece is an ideal packing material.

Description

technical field [0001] The invention relates to a production process of a packaging material, in particular to a production process of a PVC / PE / PVDC composite sheet. Background technique [0002] PVC pharmaceutical packaging series composite sheet is mainly composed of PVC pharmaceutical sheet and another one or several new polymer material films and sheets, through extrusion, compounding, coating and other processing methods, it is another kind of pharmaceutical packaging that meets the requirements of pharmaceutical packaging. Novel combination of materials required. In the 1990s, the safety of medication has been paid more and more attention by everyone. Because the components of some medicines are susceptible to deliquescence and oxidation, the original PVC aluminum-plastic packaging can no longer meet the packaging requirements of these medicines. [0003] PVC / PE composite sheet is a composite sheet made of medicinal PVC hard sheet and low-density PE bonded by adhesiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/06B32B37/10B05D7/24B32B27/30
Inventor 李建杭朱建忠杨德明沈永亮
Owner 杭州塑料工业有限公司