# US 10,118,523 B2 · Seat-back frame, method for preparing the same, and seat-back for vehicle

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,118,523 B2
- Document ID: US10118523B2
- Status: Granted
- Kind: B2
- Application number: 15/328,848
- Filed: 2015-09-24
- Published: 2017-07-27
- Granted: 2018-11-06
- Earliest claimed: 2014-09-24
- Assignees: LG Hausys, Ltd.
- Applicants: LG Hausys, Ltd.
- Inventors: Kang-Hyun Song; Yong-Kil Kil; Tae-Hwa Lee; Kyung-Hoon Lee; Hee-June Kim
- Web page: https://patentgrep.com/patent/US10118523B2

## CPC

- B60N 2/68: Seat frames
- B29C 45/14221: {by tools, e.g. cutting means}
- B29C 45/14786: {Fibrous material or fibre containing material, e.g. fibre mats or fibre reinforced material}
- B29C 45/14819: {the inserts being completely encapsulated}
- B29C 70/16: using fibres of substantial or continuous length {(non-woven fabrics per se D04H3/00)}
- B29C 70/462: {Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames}
- B29D 99/0092: {Producing upholstery articles, e.g. cushions, seats (B29C63/025 takes precedence)}
- B60N 2/686: {Panel like structures}
- B60N 2/75: Arm-rests
- B29L 2031/771: {Seats}
- B60N: SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

A seatback frame includes: a body frame comprising a long fiber reinforced thermoplastic (LFT) composite material; and an inner frame comprising a continuous fiber reinforced thermoplastic (CFT) composite material buried in the body frame by insert injection-molding. A method for manufacturing the same, and a seatback for vehicles including the same are also disclosed.

## Claims

### Claim 1

A seatback frame comprising:
a body frame comprising a long fiber-reinforced thermoplastic (LFT) resin composite material, the long fiber-reinforced thermoplastic resin composite material comprising a thermoplastic resin and a reinforcing long fiber; and
an inner frame comprising a continuous fiber-reinforced thermoplastic (CFT) resin composite material buried in the body frame by insert injection-molding, the continuous fiber-reinforced thermoplastic resin composite material comprising a thermoplastic resin and a reinforcing continuous fiber,
wherein
the inner frame is formed in advance by press-molding to implement a predetermined shape,
the long fiber-reinforced thermoplastic resin composite material contains 30% by weight to 40% by weight of the reinforcing long fibers having a length from 50 mm to 100 mm,
the continuous fiber-reinforced thermoplastic resin composite material contains 60% by weight to 70% by weight of the reinforcing continuous fibers having a length of 10 cm or more,
the continuous fiber-reinforced thermoplastic resin composite material has a tensile strength of 300 MPa to 600 MPa according to ASTM D638 standard specification, and a bending strength of 350 MPa to 500 MPa according to ASTM D790 standard specification,
the long fiber-reinforced thermoplastic resin composite material has a tensile strength of 100 MPa to 120 MPa according to ASTM D638 standard specification, and a bending strength of 100 MPa to 200 MPa according to ASTM D790 standard specification.

### Claim 2 (depends on 1)

The seatback frame according to claim 1, wherein the thermoplastic resin included in the long fiber-reinforced thermoplastic resin composite material or the continuous fiber-reinforced thermoplastic resin composite material comprises at least one selected from a group consisting of a polypropylene resin, a polyethylene resin, a polyamide resin, a polyester resin, a polyphenylene sulfide resin and a combination thereof.

### Claim 3 (depends on 1)

The seatback frame according to claim 1, wherein the reinforcing long fiber and/or the reinforcing continuous fiber comprises at least one selected from a group consisting of glass fiber, aramid fiber, natural fiber, polyester fiber, polyamide fiber and a combination thereof.

### Claim 4 (depends on 1)

The seatback frame according to claim 1, further comprising:
an armrest frame,
wherein the body frame and the armrest frame are integrally molded.

### Claim 5 (depends on 1)

A seatback for vehicles comprising: the seatback frame according to claim 1.

### Claim 6

A method for manufacturing a seatback frame, the method comprising:
preparing an inner frame having a predetermined shape by forming a continuous fiber-reinforced thermoplastic (CFT) resin composite material in advance by press-molding, the long fiber-reinforced thermoplastic resin composite material comprising a thermoplastic resin and a reinforcing long fiber; and
inserting and injection-molding the inner frame into a long fiber-reinforced thermoplastic (LFT) resin composite material to manufacture a body frame having the inner frame buried therein, the continuous fiber-reinforced thermoplastic resin composite material comprising a thermoplastic resin and a reinforcing continuous fiber,
wherein
the long fiber-reinforced thermoplastic resin composite material contains 30% by weight to 40% by weight of the reinforcing long fibers having a length from 50 mm to 100 mm,
the long fiber-reinforced thermoplastic resin composite material has a tensile strength of 100 MPa to 120 MPa according to ASTM D638 standard specification, and a bending strength of 100 MPa to 200 MPa according to ASTM D790 standard specification,
the continuous fiber-reinforced thermoplastic resin composite material contains 60% by weight to 70% by weight of the reinforcing continuous fibers having a length of 10 cm or more, and
the continuous fiber-reinforced thermoplastic resin composite material has a tensile strength of 300 MPa to 600 MPa according to ASTM D638 standard specification, and a bending strength of 350 MPa to 500 MPa according to ASTM D790 standard specification.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the press-molding is carried out at a temperature of 40° C. to 60° C.

### Claim 8 (depends on 7)

The method according to claim 7, wherein the press-molding is carried out at a pressure of 100,000 kgf/cm2 to 300,000 kgf/cm2.