Press-through pack package

Patent metadata

Field	Value
Publication number	US-9850052-B2
Application number	US-201113302157-A
Country	US
Kind code	B2
Filing date	Nov 22, 2011
Priority date	May 12, 2009
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

The press-through pack package of the invention has a covering material composed of a stretched film with at least one layer comprising a thermoplastic resin and an inorganic filler at 5 parts by weight with respect to 100 parts by weight of the thermoplastic resin.

First claim

What is claimed is:

1. A press-through pack (PTP) package, comprising:
a base material; and
a covering material,
wherein the covering material is composed of a stretched film including at least one layer which comprises a styrene-based resin having a styrene-based monomer component of 70-97 wt % and an ester component of 2-20 wt %, and an inorganic filler at less than 5 parts by weight with respect to 100 parts by weight of the styrene-based resin, and
wherein the styrene-based resin is at least one terpolymer resin selected from the group consisting of a terpolymer resin consisting of monomer components of styrene-acrylic acid copolymer resins and an ester component, a terpolymer resin consisting of monomer components of styrene-methacrylic acid copolymer resins and an ester component, and a terpolymer resin consisting of monomer components of styrene-maleic anhydride copolymer resins and an ester component.

2. A press-through pack package according to claim 1 , wherein the stretched film has a value of 0.2-5.4 MPa for the peak value of the orientation release stress, measured at a temperature 20° C. higher than the Vicat softening temperature of the styrene-based resin, in both the MD and TD of the film.

3. A press-through pack package according to claim 1 , wherein the mean particle size of the inorganic filler is 1-10 μm.

4. A press-through pack package according to claim 1 , wherein the inorganic filler is an amorphous aluminosilicate.

5. A press-through pack package according to claim 1 , wherein the stretched film has a thickness of 5-30 μm.

6. A press-through pack package according to claim 1 , wherein the stretched film has an aluminum vapor deposition layer laminated on at least one side.

7. A press-through pack (PTP) package with a covering material composed of a stretched film including at least one layer which comprises a styrene-based resin having a styrene-based monomer component of 70-97 wt % and an ester component of 2-20 wt %, and an inorganic filler at less than 5 parts by weight with respect to 100 parts by weight of the styrene-based resin,
wherein the styrene-based resin is at least one terpolymer resin selected from the group consisting of a terpolymer resin consisting of monomer components of styrene-acrylic acid copolymer resins and an ester component, a terpolymer resin consisting of monomer components of styrene-methacrylic acid copolymer resins and an ester component, and a terpolymer resin consisting of monomer components of styrene-maleic anhydride copolymer resins and an ester component, and
wherein the stretched film has a piercing strength of 1-5N as measured by a piercing strength test of JIS Z1707.

8. A press-through pack (PTP) package, comprising:
a base material; and
a covering material,
wherein the covering material is composed of a stretched film including at least one layer which comprises a styrene-based resin having a styrene-based monomer component of 70-97 wt % and an ester component of 2-20 wt % and an inorganic filler at less than 5 parts by weight with respect to 100 parts by weight of the styrene-based resin,
wherein the styrene-based resin is at least one terpolymer resin selected from the group consisting of a terpolymer resin consisting of monomer components of styrene-acrylic acid copolymer resins and an ester component, a terpolymer resin consisting of monomer components of styrene-methacrylic acid copolymer resins and an ester component, and a terpolymer resin consisting of monomer components of styrene-maleic anhydride copolymer resins and an ester component,
wherein the stretched film has a value of 0.2-5.4 MPa for the peak value of the orientation release stress, measured at a temperature 20° C. higher than the Vicat softening temperature of the styrene-based resin, in either the MD or the TD of the film, and
wherein the stretched film has a piercing strength of 1-5 N when measured with a piercing strength measuring jig having a 1.0 mm piercing tip spherical diameter.

9. A press-through pack (PTP) package with a covering material composed of a stretched film including at least one layer which comprises a styrene-based resin having a styrene-based monomer component of 70-97 wt % and an ester component of 2-20 wt %, and an inorganic filler at less than 5 parts by weight with respect to 100 parts by weight of the styrene-based resin,
wherein the styrene-based resin is at least one terpolymer resin selected from the group consisting of a terpolymer resin consisting of monomer components of styrene-acrylic acid copolymer resins and an ester component, a terpolymer resin consisting of monomer components of styrene-methacrylic acid copolymer resins and an ester component, and a terpolymer resin consisting of monomer components of styrene-maleic anhydride copolymer resins and an ester component, and
wherein the stretched film has a piercing strength of 1-5 N when measured with a piercing strength measuring jig having a 1.0 mm piercing tip spherical diameter.

Assignees

• Yagi Masahiro
• Kimura Hiroaki
• Matsuki Yutaka
• Hayashi Hideki
• Asahi Kasei Chemicals Corp

Inventors

• Yagi Masahiro
• Kimura Hiroaki
• Matsuki Yutaka
• Hayashi Hideki

Classifications

• B65D75/327 Primary

  and forming several compartments · CPC title