Analysis of Patented Technology of Polylactic Acid Laminated Panels

13. Title: LAMINATED FILM (laminated film)

Source: JP 2005144726 (public date: 2005.06.09, filing date: 2003.11.12)

Applicant: TORAY IND INC

The novelty of this invention is that a laminated film includes an A/B/A layer structure or a B/A/B layer structure, layer (A) includes a crystalline polylactic acid-based polymer A, and layer (B) includes a crystalline resin component B. The glass transition temperature Tg, melting point Tm, and crystallization temperature Tc of the polymers A, B satisfy a specific relationship: Tg(A)≥Tg(B), Tm(A)≥Tc(B).

Uses: Can be used for packaging materials and industrial materials.

Advantages: Laminated film is easy to tear, solvent resistance, as industrial materials and packaging materials have a good opening, solvent resistance and printability. The laminated film is biodegradable and rapidly decomposes.

14. Title: POLYLACTIC ACID LAMINATED FILM (Polylactic Acid Laminated Film)

Source: JP 2005144694 (public date: 2005.06.09, filing date: 2003.11.11)

Applicant: CI KASEI CO LTD

The novelty of the invention consists in that the laminated film consists of three or more layers formed from a mixture of co-extruded polylactic acid (50-95 wt%) and plasticizer (5-50 wt%). The surface layer of the laminated film contains an inorganic compound ultrafine powder (wt%) 0.05-2, a lubricant 0.05-2, and a mixture of 100. The laminated film has a thickness of 10-300 μm. The thickness of the surface layer accounts for 5-30% of the total thickness of the film.

Uses: Used as packaging film, stretch film and protective film for agricultural film, food and other products.

Advantages: The laminated film has excellent elasticity, transparency, biodegradability and anti-blocking properties.

15. Title: POLYLACTIC ACID TYPE MULTILAYERED SHEET AND ITS MANUFACTURING METHOD

Source: JP 2005119062 (public date: 2005.05.12, filing date: 2003.10.15)

Applicant: KANEBO GOSEN KK, KANEBO LTD

The innovation of the invention lies in a polylactic acid-based multilayer sheet comprising a layer (A) composed of a lactic acid-based polyester component comprising a lactic acid component (I) and a polyester component (II); (B) consists of a lactic acid-based polyester component and polylactic acid. The plane orientation degree (DELTAP) of the sheet is ≤ 0.0300, the thermal energy (DELTAH) is released ≤ 15 J/g, and the melting point is 0-10°C. The polylactic acid-based multilayer sheet is produced using a uniaxial stretching and a biaxial stretching process.

Uses: Can be used for food packaging bags, garbage bags, umbrellas, agricultural film, gardening film, product packaging film, projector film, heat reflective film and liquid crystal display film.

Advantages: Polylactic acid multilayers have high transparency, excellent heat resistance and folding resistance.

Focal point technology: At most 99% by weight of polylactic acid is contained in the multilayer B layer, the lactic acid component (I) in the lactic acid-based polyester component is polylactic acid, and the polyester component (II) is mainly composed of an aliphatic polyester. Polyester. The content of aliphatic in the polyester component (II) is 30-100%, and the B layer accounts for 20-80% of the entire sheet.

Optimum properties: The multilayer sheet haze value ≤ 20%, thickness 0.3 mm.

The best method: multi-layer heating time ≥ 1 second, heating temperature ≤ 90 °C.

16. Title: Biodegradable laminates

Source: JP 2005096262 (public date: 2005.04.14, filing date: 2003.09.25)

Applicant: UBE IND LTD

The novelty of the invention: The biodegradable laminate contains a polylactic acid layer and a polyoxalic acid layer, and the structure of the polyoxalic acid is set in advance.

The structure of the polyoxalic acid involved in the present invention is: -(OROC(=O)-C(=O))n-, where R is a hydrocarbylene group, contains a branched or aliphatic structure, the main chain is 3-12C, n is Positive integer.

Uses: The biodegradable laminate of the present invention can be used as a film, a sheet, and a molded product thereof.

Advantages: The laminate is biodegradable, with excellent air tightness and transparency.

Focus Technology - Preferred components: Polyoxalic acid is polydimethylene cyclohexene oxalic acid, polyoxalic acid has an average molecular weight of 20,000 to 70,000, and polylactic acid has an average molecular weight of 20,000 to 500,000. The haze of the polyoxalic acid film is ≤ 0.4.

17. Title: POLYLACTIC ACID LAMINATED SHEET FOR THERMAL BENDING FORMING (Polylactic Laminate for Thermal Bending)

Source: JP 2004358844 (public date: 2004.12.24, filing date: 2003.06.05)

Applicant: MITSUBISHI PLASTICS IND LTD

The novelty of the invention: the laminate comprises a polylactic acid-based polymer layer (A, B); the melting point (Tmb) of the polylactic acid-based polymer layer (B) is lower than the melting point (Tma) of the polymer layer (A), And satisfy the following predetermined relationship: 180> Tma ≥ 154, Tma-Tmb ≥ 10. Layer B contains biodegradable aliphatic polyesters other than polylactic acid.

Uses: Can be used for hot bending moulded products such as sliding foam containers, calendar holders and food containers.

Advantages: The laminate has good heat resistance, bending moldability and excellent impact strength.

18. Title: DECORATIVE SHEET FOR GAME MACHINE

Source: JP 2004329429 (public date: 2004.11.25, filing date: 2003.05.02)

Applicant: MORI MOKKO KK

The novelty of the invention: the decorative panel has a transparent resin layer with a haze value of ≤5 (according to the Japanese standard JIS K7105); the resin layer comprises a polylactic acid based polymer and a biodegradable fat containing a glass transition point ≤ 0°C. Polyester biodegradable resin.

Uses: Used for the game board of the pinball game machine and the drum surface of the rotating barrel game machine.

Advantages: The decorative plate has high transparency, good appearance, environmental friendliness, and has good impact strength and processability.