# US 4,394,416 A · Film-paper fiber layer laminate and process for preparation thereof

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- Number: US 4,394,416 A
- Document ID: US4394416A
- Status: Granted
- Kind: A
- Application number: 06/267,380
- Filed: 1981-05-26
- Granted: 1983-07-19
- Earliest claimed: 1979-12-12
- Assignees: Azona Co., Ltd.
- Inventors: Yoshikazu Shimizu; Kathuhiro Yamaguchi
- Web page: https://patentgrep.com/patent/US4394416A

## CPC

- B32B 27/10: of paper or cardboard
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 25/06: of paper or cardboard
- B32B 25/14: comprising {synthetic rubber copolymers (B32B25/18 and B32B25/20 take precedence)}
- B32B 27/281: {comprising polyimides}
- B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers}
- B32B 27/304: {comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF}
- B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/34: comprising polyamides
- B32B 27/36: comprising polyesters
- B32B 27/365: {comprising polycarbonates}
- B32B 37/203: {One or more of the layers being plastic}
- B32B 38/10: Removing layers, or parts of layers, mechanically or chemically
- D21H 27/36: Films made from synthetic macromolecular compounds
- B32B 2309/105: Thickness
- B32B 2317/12: Paper, e.g. cardboard
- B32B 2319/00: Synthetic rubber
- B32B 2323/04: Polyethylene
- B32B 2323/10: Polypropylene
- B32B 2325/00: Polymers of vinyl-aromatic compounds, e.g. polystyrene
- B32B 2327/06: PVC, i.e. polyvinylchloride
- B32B 2367/00: Polyesters, e.g. PET, i.e. polyethylene terephthalate
- B32B 2369/00: Polycarbonates
- B32B 2377/00: Polyamides
- B32B 2379/00: Other polymers having nitrogen, with or without oxygen or carbon only, in the main chain
- Y10T 156/1059: Splitting sheet lamina in plane intermediate of faces
- Y10T 428/273: of coating
- Y10T 428/31507: Of polycarbonate
- Y10T 428/31721: Of polyimide
- Y10T 428/31783: Paper or wood
- Y10T 428/3179: Next to cellulosic
- Y10T 428/31841: Next to cellulosic
- Y10T 428/31895: Paper or wood
- Y10T 428/31902: Monoethylenically unsaturated
- Y10T 428/31906: Ester, halide or nitrile of addition polymer
- Y10T 428/31993: Of paper
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Disclosed is a film-paper fiber layer laminate comprising a film and a very thin paper fiber layer bonded to the surface of the film. This laminate is prepared by bonding films to both surfaces of a paper so that the adhesive bond strength between the film and the paper is higher than the failure strength of the paper fiber layer and separating the films by delamination. This film-paper fiber layer laminate is excellent in the transparency and dimension stability, and the tearing strength of the film per se is completely retained and the laminate is suitably used as a tracing paper.

## Claims

### Claim 1

A film-paper fiber layer laminate comprising a film selected from the group consisting of a polyvinyl chloride film, a polyethylene film, a polypropylene film, a polystyrene film, a polyacetate film, a polycarbonate film, a polyester film, a polyamide film, a polyimide film and a chlorinated rubber film; and a thin paper fiber layer bonded to the film, the basis weight of the paper fiber layer being 5 to 15 g/m.sup.2.

### Claim 2 (depends on 1)

A film-paper fiber layer laminate as set forth in claim 1, wherein the basis weight of the paper fiber layer is 5 to 8 g/m.sup.2.

### Claim 3 (depends on 1, 2)

A film-paper fiber layer laminate as set forth in claim 1 or 2, wherein the paper fiber layer is a fiber layer of a Japanese paper or machine-made paper.