Hot melting composite technology for preparing polyvinyl chloride/polyethylene hard composite sheet
A polyvinyl chloride, polyvinyl chloride layer technology, applied in the direction of synthetic resin layered products, flexible coverings, lamination, etc., can solve the problems of threatening drugs, not suitable for the wide use of drug packaging, etc., and achieve the goal of maintaining uniformity Effect
Inactive Publication Date: 2015-01-28
SICHUAN HUILI IND
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AI Technical Summary
Problems solved by technology
However, due to the potential danger of threatening medicines due to the presence of harmful residues such as isocyanates in polyurethane adhesives, it is not suitable for widespread use in pharmaceutical packaging.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1-4
[0015] The preparation method of the polyvinyl chloride / polyethylene composite sheet mentioned in the present invention is specifically as follows:
[0016] After respectively heating the adhesive surface of the polyvinyl chloride layer and the adhesive surface of the polyethylene layer to the temperature shown in the following table 1, the adhesive surface of the polyvinyl chloride layer is attached to the adhesive surface of the polyethylene After adjacent lamination, it is pressed into a polyvinyl chloride / polyethylene composite sheet under a pressure of 1.8-2.0Mpa.
[0017] And carry out the performance test to the composite sheet made above and record in the following table 1.
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Abstract
The invention discloses a hot melting composite technology for preparing a polyvinyl chloride / polyethylene hard composite sheet. The preparation method for the polyvinyl chloride / polyethylene hard composite sheet comprises the steps of heating an adhesive surface of a polyvinyl chloride layer by a hot melting composite method to 80-90 DEG C, heating an adhesive surface of a polyethylene layer to 75-90 DEG C, and adjacently stacking the adhesive surface of the polyvinyl chloride layer and the adhesive surface of the polyethylene layer to form the polyvinyl chloride / polyethylene hard composite sheet. The problem can be effectively solved by the composite sheet prepared by the preparation method disclosed by the invention; the composite sheet with more proper adhesive strength and thickness fluctuation is obtained.
Description
technical field [0001] The invention belongs to the field of packaging material preparation, and in particular relates to a polyvinyl chloride / polyethylene composite hard sheet prepared by a hot-melt composite process. Background technique [0002] Plastic products are widely used due to their light weight, good corrosion resistance and low cost, especially in the pharmaceutical field, plastic composite films / plastic composite sheets are widely used. [0003] However, the existing packaging composite films / sheets are usually made by bonding two or more layers of plastic sheets / or plastic films through adhesives, such as polyurethane adhesives. However, due to the potential danger of threatening medicines due to the presence of harmful residues such as isocyanates in polyurethane adhesives, it is not suitable for widespread use in pharmaceutical packaging. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a hot-mel...
Claims
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IPC IPC(8): B32B27/08B32B7/10B32B37/06B32B37/10B65D65/40
CPCB32B27/08B32B7/10B32B27/32B32B37/06B32B37/10B65D65/40
Inventor 肖世才韩军张辉
Owner SICHUAN HUILI IND