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PVC high-barrier sheet and preparation method thereof

A high-barrier, sheet technology, applied in the field of PVC high-barrier sheet and its preparation, can solve problems such as poor water vapor and oxygen barrier properties, unfavorable environmental protection, and increased product processing costs, so as to achieve easy recycling and reuse, increase gas Through the path, the effect of improving the barrier properties of the sheet

Inactive Publication Date: 2020-02-04
SUZHOU OCAN POLYMER MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polyvinyl chloride (PVC) material has the advantages of easy secondary molding, low price, and good heat sealability. It is widely used in the packaging field of food and tablets, but its thermal stability is poor, and it has poor barrier properties to water vapor and oxygen. Purely using PVC The material does not meet the requirements of pharmaceutical and food packaging, and PVC / PVDC, PVC / aluminum foil composites are usually used to improve the barrier property. This method greatly increases the product processing cost and the material cannot be recycled again. Buried or incinerated, not conducive to environmental protection

Method used

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  • PVC high-barrier sheet and preparation method thereof
  • PVC high-barrier sheet and preparation method thereof

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Embodiment 1

[0026] The invention provides a PVC high-barrier sheet, wherein the main materials used include the following raw materials in parts by weight: 45-55 parts of PVC, 8-15 parts of PVA, 12-18 parts of EVOH, 10-15 parts of PA, 6-12 parts of mica, the auxiliary materials include 70wt%-80wt% of cubic nano-calcium carbonate and 20wt%-30wt of flaky nano-calcium carbonate by weight percentage;

[0027] The ratio between the cubic nano-calcium carbonate and the flaky nano-calcium carbonate is 3-4:1-1.5, and the weight ratio of the main material and the auxiliary material is set to 100:1.8-2.5;

[0028] And be specific in the present embodiment: wherein the main material used comprises the raw material of following parts by weight: PVC45 parts, PVA15 parts, EVOH 18 parts, PA 115 parts, mica 12 parts, described auxiliary material comprises cubic shape by weight percentage Nano calcium carbonate 75wt%, flake nano calcium carbonate 25%wt;

[0029] The present invention also includes the pr...

Embodiment 2

[0038] The invention provides a PVC high-barrier sheet, wherein the main materials used include the following raw materials in parts by weight: 45-55 parts of PVC, 8-15 parts of PVA, 12-18 parts of EVOH, 10-15 parts of PA, 6-12 parts of mica, the auxiliary materials include 70wt%-80wt% of cubic nano-calcium carbonate and 20wt%-30wt of flaky nano-calcium carbonate by weight percentage;

[0039] The ratio between the cubic nano-calcium carbonate and the flaky nano-calcium carbonate is 3-4:1-1.5, and the weight ratio of the main material and the auxiliary material is set to 100:1.8-2.5;

[0040] And specifically in the present embodiment: wherein the main material used comprises the raw material of following parts by weight: 50 parts of PVC, 12 parts of PVA, 16 parts of EVOH, 12 parts of PA, 9 parts of mica, described auxiliary material comprises cubic shape by weight percentage Nano calcium carbonate 75wt%, flake nano calcium carbonate 25%wt;

[0041] The present invention also...

Embodiment 3

[0050] The invention provides a PVC high-barrier sheet, wherein the main materials used include the following raw materials in parts by weight: 45-55 parts of PVC, 8-15 parts of PVA, 12-18 parts of EVOH, 10-15 parts of PA, 6-12 parts of mica, the auxiliary materials include 70wt%-80wt% of cubic nano-calcium carbonate and 20wt%-30wt of flaky nano-calcium carbonate by weight percentage;

[0051] The ratio between the cubic nano-calcium carbonate and the flaky nano-calcium carbonate is 3-4:1-1.5, and the weight ratio of the main material and the auxiliary material is set to 100:1.8-2.5;

[0052] And specifically in the present embodiment: wherein the main material used comprises the following raw materials in parts by weight: 50 parts of PVC, 12 parts of PVA, 16 parts of EVOH, 12 parts of PA, 9 parts of mica;

[0053] The present invention also includes the preparation method of PVC high-barrier sheet, and the specific preparation steps are as follows:

[0054] S1. Raw material ...

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Abstract

The invention discloses a PVC high-barrier sheet and a preparation method thereof and particularly relates to the field of PVC composite materials. Main materials include, by weight, 45-55 parts of PVC, 8-15 parts of PVA, 12-18 parts of EVOH, 10-15 parts of PA and 6-12 parts of mica. Auxiliary materials include, by weight, 70wt%-80wt% of cubic nano calcium carbonate and 20wt%-30wt% of sheet nano calcium carbonate. According to the PVC high-barrier sheet, a composite material is prepared through blending of the PVA, the EVOH, the PA and the PVC; in the stretching process, dispersed PVA, EVOH and PA fragments are generated in the stretching process according to the condition that the PVA, the EVOH, the PA and the PVC have different softening points, the barrier property of the sheet is improved, and the sheet is easier to recycle; and the barrier property of the PVC blending material on oxygen and water is improved by using the barrier property of the PVA, the EVOH, the PA and the mica,the requirements of medicinal materials and food packages on materials are met, the PVC / mica composite material is prepared, and the barrier property of the sheet is improved.

Description

technical field [0001] The invention relates to the technical field of PVC composite materials, more specifically, the invention relates to a PVC high-barrier sheet and a preparation method thereof. Background technique [0002] Polyvinyl alcohol (PVC) is an organic compound, white flaky, flocculent or powdery solid, odorless. Soluble in water, insoluble in gasoline, kerosene, vegetable oil, benzene, toluene, dichloroethane, carbon tetrachloride, acetone, ethyl acetate, methanol, ethylene glycol, etc. Slightly soluble in dimethyl sulfoxide. Polyvinyl alcohol is an important chemical raw material for the manufacture of polyvinyl acetal, gasoline-resistant pipes and vinylon synthetic fibers, fabric treatment agents, emulsifiers, paper coatings, adhesives, glues, etc. Polyvinyl chloride (PVC) resin is a thermoplastic high polymer polymerized by vinyl chloride (VC) monomer. It is one of the four general-purpose plastics in the world. Because its production cost is lower than t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L29/04C08L23/08C08L77/00C08K3/34C08K7/00C08K3/26C08J5/18
CPCC08J5/18C08J2327/06C08J2423/08C08J2429/04C08J2477/00C08K3/34C08K7/00C08K2003/265C08K2201/011C08K2201/014
Inventor 马青赛朱山宝
Owner SUZHOU OCAN POLYMER MATERIAL CO LTD