Polyester sheet, polyester molded article, and polyester resin masterbatch

A technology of polyester sheet and polyethylene terephthalate, which is applied in the fields of polyester sheet, polyester molded products, and polyester resin masterbatch, which can solve the problems of poor sliding properties of raw materials and achieve excellent anti-blocking properties , Excellent effect of transparency

Active Publication Date: 2012-08-01
TOMOYA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the raw material itself has poor sliding properties or agglomerates, it is difficult to pull out smoothly from the stacked state, and sometimes several packaging containers are taken out in a stacked state.

Method used

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  • Polyester sheet, polyester molded article, and polyester resin masterbatch
  • Polyester sheet, polyester molded article, and polyester resin masterbatch
  • Polyester sheet, polyester molded article, and polyester resin masterbatch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6、 comparative example 1～8

[0088] Such as Figure 5 As shown in the table of , a total of 14 types of single-layer sheets were prepared as Examples 1-6 and Comparative Examples 1-8. Specifically, a raw material mixture of PET resin or PETC resin, ester compound, and spherical silica in the blending amount shown in the figure was supplied to three twin-screw extruders (Extruder), and the barrel was heated to temperature The mixture was melted at 260°C to 285°C, extruded from a T-die by a three-layer co-extrusion method, and cooled by a cooling roll at 35°C to form a sheet with a thickness of 0.2mm.

[0089] from Figure 5 It can be seen that, in Examples 1 to 6, favorable results were obtained in which all of the sliding properties, blocking resistance, and transparency were well-balanced.

Embodiment 7～11、 comparative example 9～10

[0092] Such as Figure 6 As shown in the table of , as Examples 7 to 11 and Comparative Examples 9 to 10, a total of 7 types of polyester sheets with a multilayer structure were produced. Only PET raw materials are used in the base layer without any slip agent, and PETC is used as the base polymer on both surface layers, and ester compound and spherical silica are added.

[0093] Depend on Figure 6 It can be seen that, in Examples 7 to 11, favorable results were obtained in which all aspects of sliding properties, blocking resistance, and transparency were well-balanced. In addition, it can be seen that when PETC is used as the matrix polymer of the surface layer, the same Figure 5 Compared with the case of using PET, when the blending amount of the ester compound and the blending amount of silica are increased, good sliding properties can be obtained.

[0094] In Comparative Example 9, in which no ester compound was added to the surface layer, both slipperiness and block...

Embodiment 12～14

[0096] Such as Figure 7 As shown in the table of , as Examples 12 to 14, three types of polyester sheets with a multilayer structure were produced. In the base layer, only PET raw material is used without adding any slip agent. In both surface layers, PET raw material is used as the matrix polymer, and ester compound and spherical silica are compounded.

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Abstract

A polyester sheet having a surface layer wherein 0.05-2.0% by weight of an ester compound, which is synthesized by using a polyvalent organic acid having 3 or more carboxyl groups and an aliphatic monohydric alcohol having 8 or more carbon atoms, and 0.01-0.5% by weight of inert inorganic particles having an average particle diameter of 2-15 [mu]m are blended into a polyethylene terephthalate polymer. The polyester sheet has a rational balance between sliding properties and transparency.

Description

technical field [0001] The present invention relates to a polyethylene terephthalate-based sheet, and molded products such as trays, packaging containers, and sheet packaging materials obtained by processing the sheet. Background technique [0002] Unstretched polyester sheets are amorphous, have excellent transparency, and can be punched and cut or bent. Therefore, by using thermoforming methods, they are widely used in containers for food and pharmaceuticals, and cover sheets for miscellaneous goods (Blister pack), transparent bags (クリヤ一ケ一ス) and other outer packaging transparent containers. [0003] Polyester sheets, which are raw materials for forming these packaging containers, are cut into predetermined widths and lengths, laminated, and supplied one by one to a printing machine or a forming machine. However, when the slipperiness of the sheet is poor or the sheet is blocked, it is difficult to reliably supply sheet by sheet. In some cases, when agglomerated sheets ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02B32B27/20B32B27/36C08J3/22C08J5/18C08K3/00C08K5/12
CPCC08J3/22C08J3/226C08K5/12C08J2467/00B32B27/20C08J2367/02C08K3/36B32B27/36B32B2307/75B32B2439/00Y10T428/2495C08L67/02C08J5/18
Inventor 黑田幸隆北口贵启上原俊幸
Owner TOMOYA
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