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Polyglycolic acid-based resin composition and shaped product thereof

A technology of resin composition and polyglycolic acid, which is applied in the direction of synthetic resin layered products, layered products, chemical instruments and methods, etc., can solve the problems that it is difficult to make full use of polyglycolic acid resin, etc.

Inactive Publication Date: 2006-05-03
KUREHA KAGAKU KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, any composite material uses an aromatic polyester resin as a main component, and it is intended to use a relatively small amount of polyglycolic acid resin to improve its gas barrier properties. However, it is difficult to say that it makes full use of polyglycolic acid resin. the excellent characteristics of

Method used

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  • Polyglycolic acid-based resin composition and shaped product thereof
  • Polyglycolic acid-based resin composition and shaped product thereof
  • Polyglycolic acid-based resin composition and shaped product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] Next, the present invention will be described more specifically by way of examples and comparative examples. For evaluation, the following measurements were performed.

[0047] Thickness structure of films or sheets , and measured using "Layer Gauge II" manufactured by Topwell Co., Ltd.

[0048] Stretchability , the case where the reduction in transparency of the molded product is hardly caused by stretching is judged as "A", and the case where the transparency of the molded product is lowered is judged as "C". The decrease in transparency is due to the occurrence of poor stretchability.

[0049] Humidity Stability According to the conditions of 80 ℃ and relative humidity of 95%, it is judged whether "cracks" appear after being placed for 6 hours and 12 hours respectively. The case where "cracks" did not appear after 12 hours of storage was judged as "A", the situation of "cracks" after 12 hours of storage but no "cracks" appeared after 6 hours was judged as "B",...

example 1～ example 8

[0057] Using a multi-layer sheet (T-die) device connected to three 40φ extruders, the particles (Pe1-Pe9) in Table 1 are arranged in the middle layer, and PET ("9921W" manufactured by Eastman, IV) is arranged in the inner and outer layers. =0.80, at 270°C, the melt viscosity at a shear rate of 121 / s is 620P s), formed into a 3-layer multilayer sheet (thickness composition: inner layer / middle layer / outer layer is about 100μm / 100μm / 100μm ), the turbidity % value was determined. The outline|summary of Example 1-Example 9 is shown in Table 2.

[0058] Table 2: Multilayer flakes

[0059]

[0060] The multilayer sheets obtained in the above Examples 1 to 9 were heated at 120° C. for 10 to 20 seconds, respectively, and simultaneously biaxially stretched to form a length and width of about 4×4 times (the area ratio is 14 to 18 times, Thickness) stretched film, the measurement results shown in the following Table 3 (Examples 10 to 18) were obtained.

[0061] Example 10...

example 19～ example 22

[0064] Among the pellets shown in Table 1, Pe6 (PGA / co-PET=70 / 30 (% by weight)) was used, melted at 250° C., and molded into a pressed sheet having a thickness of 100 μm. The turbidity %, as shown in Table 1, was 80%. The pressed sheet was heated at 120° C. for 10 to 20 seconds, and simultaneously biaxially stretched at different magnifications (Example 19 was not stretched) to form a stretched film (single layer), and the following Table 4 (Example 19 was not stretched) was obtained. ~ 22) show the measurement results.

[0065] Table 4: Stretch Films

[0066]

[0067] * : (20μm; cc / m 2 / day / atm)

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Abstract

A polyglycolic acid-based resin composition is formed by adding a relatively small amount of aromatic polyester resin to a polyglycolic acid resin. The thus-formed composition is provided with remarkably improved moisture resistance stability and hot-melt processability, and further improved stretchability, while retaining the excellent properties as represented by gas barrier property of the polyglycolic acid resin. As a result of stretching by utilizing the improved stretchability, a shaped product having an improved transparency can be obtained.

Description

technical field [0001] The present invention relates to a polyglycolic acid resin composition, which is mainly composed of polyglycolic acid resin and contains a relatively small amount of aromatic polyester resin, and also relates to a molded product of the polyglycolic acid resin composition. Background technique [0002] Because polyglycolic acid (PGA, containing polyglycolide) not only has excellent biodegradability, but also has excellent heat resistance, gas barrier properties, rigidity (mechanical properties as a packaging material), etc., people are seeking development Its new application as a molding material for various sheets, films, containers, injection molded products, etc. Bulletin No. 337772). However, since polyglycolic acid resin exhibits hydrolyzability, it is expected to obtain a molding material with improved properties by compounding it with other thermoplastic resins rather than using polyglycolic acid resin alone as a molding material. [0003] On t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04B32B27/36C08L67/02C08L101/16
CPCB32B27/36C08L67/02C08L67/04C08L2666/18C08L71/00C08K5/005C08J5/18C08L2203/16C08L2201/10
Inventor 山根和行佐藤浩幸川上进盟
Owner KUREHA KAGAKU KOGYO KK
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