Laminated package material

A technology of packaging materials and thermoplastic materials, applied in the field of laminated packaging materials, can solve problems such as waste of energy and raw materials, and achieve the effects of reduced necking, high pass rate, and long shelf life

CN104742441AInactive Publication Date: 2015-07-01TAIZHOU ZHUYE MACHINERY SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-07-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a lamination packaging material which comprises an outermost thermoplastic material layer, a core layer, an intermediate thermoplastic material layer, a barrier layer, an adhesive layer and an innermost thermoplastic material layer from outside to inside, wherein the adhesive layer comprises metalloscene catalyst polymerized linear low-density polyethylene (MLLDPE) and low-density polyethylene (LDPE), wherein the mLLDPE has the following parameters: the average density is 0.88g / cm<3>-0.925g / cm<3>, the melt index (190 DEG C, 2.16kg) is 5g / 10min-20g / 10min, the peak melting point is 85 DEG C-130DEG C, and the expansion ratio is 1.2-1.8; and the LDPE has the following parameters: the average density is 0.90g / cm<3>-0.925g / cm<3>, the melt index (190 DEG C, 2.16kg) is 5g / 10min-20g / 10min, the peak melting point is 85 DEG C-110DEG C, and the expansion ratio is 1.2-1.8. During the process for manufacturing a packaging container by using the lamination packaging material provided by the invention, a longitudinal sealing part can be subjected to heat sealing rapidly, so as to obtain the packaging container with good sealing intensity, and the manufactured container has high yield and long durability time for liquid food.
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Description

[0001] The patent application of the present invention is a divisional application based on the patent application for a laminated packaging material filed by the applicant for the first time. The filing date of the original application is December 31, 2012, and the application number is 201210593137.3. technical field

[0002] The invention relates to a laminated packaging material, in particular to a laminated packaging material for packaging liquid food. Background technique

[0003] At present, disposable disposable packaging containers for liquid food have shapes such as bricks, squares, triangles, octahedrons with hexagonal cross-sections, and pillows. Usually, the laminated packaging materials used to manufacture these packaging containers include sequential layers. The outermost layer of thermoplastic material, the core layer, the middle layer of thermoplastic material, the barrier layer, the adhesive layer and the innermost layer of thermoplastic material, and there ...

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Embodiment Construction

[0022] Such as figure 2 As shown, a laminated packaging material of the present invention comprises an outermost layer 21 of thermoplastic material, a core layer 22, an intermediate layer 23 of thermoplastic material, a barrier layer 24, an adhesive layer 25 and an innermost layer 26 of thermoplastic material from outside to inside.

[0023] The adhesive layer 25 comprises metallocene catalyst polymerized linear low density polyethylene (MLLDPE) and low density polyethylene (LDPE), wherein the metallocene catalyst polymerized linear low density polyethylene (mLLDPE) has the following parameters: the average density is 0.88g / cm 3 ~0.925 g / cm 3 , Melt flow index (190℃, 2.16kg) is 5 g / 10min~20 g / 10min, peak melting point is 85℃~130℃, expansion ratio is 1.2~1.8; low density polyethylene (LDPE) has the following parameters: The average density is 0.90g / cm 3 ~0.925 g / cm 3 , Melt flow index (190℃, 2.16kg) is 5 g / 10min~20 g / 10min, peak melting point is 85℃~110℃, expansion rat...