FIBER REINFORCED LAMINATED PLASTIC FILM AND METHOD OF MAKING SAME

• US 3,644,165 A
• Filed: 10/15/1969
• Issued: 02/22/1972
• Est. Priority Date: 10/15/1969
• Status: Expired due to Term

• Current Assignee: Wei-Gwo Chen
• Original Assignee: Wei-Gwo Chen
• Inventors: Chen, Wei-Gwo
• Primary Examiner(s): Burnett, Robert F.
• Assistant Examiner(s): Linker, Jr., Raymond O.
• Application Number:
  US04/866,599
• Time in Patent Office: 860 Days
• Field of Search: 156/177,179 161/55,57,58,59,78,109,113,142,143,144
• US Class Current: 428/110
• CPC Class Codes: B29C 70/086 and with one or more layers of pure plastics material, e.g. foam layers applying a non-preformed coating, e.g. a gel-coat, B29C37/0025; with foam blocks B29C70/86
• CPC Class Codes: B29C 70/202 arranged in parallel planes or structures of fibres crossing at substantial angles, e.g. cross-moulding compound [XMC] B29C70/207 takes precedence
• CPC Class Codes: B29C 70/687 the inserts being oriented, e.g. nets or meshes
• CPC Class Codes: B32B 27/00 Layered products comprising a layer of synthetic resin fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18
• CPC Class Codes: D04H 3/04 in rectilinear paths, e.g. crossing at right angles
• CPC Class Codes: Y10T 428/24099 On each side of strands or strand-portions
• CPC Class Codes: Y10T 428/24306 Diamond or hexagonal
• CPC Class Codes: Y10T 428/24331 including nonapertured component

Abstract

An improved fiber reinforced laminate, in which the nonwoven reinforcement is oriented in four different planes, each of the four containing fibers parallel with each other. Describing the construction in another way, it consists essentially of two diamond patterns superimposed on each other, one of which has its longer diagonals parallel with the longitudinal direction of the laminate (the machine direction), and the other has its shorter diagonal parallel with this direction. The invention also contemplates a method for mass producing this laminated article, by means of modulating the speed of the fiber angularizing means of the laminate producing machine.

Claims

2. The laminate of claim 1 wherein the acute angles of the diamonds in one of said diamond patterns are from 10* to 40*.

3. The laminate of claim 1 wherein the acute angles of the diamonDs in both of said diamond patterns are from 10* to 40*.

4. The laminate of claim 1 wherein the acute angles of the diamonds in one of said diamond patterns are between 20* and 33*.

5. The laminate of claim 1 wherein the acute angles of the diamonds in both of said diamond patterns are between 20* and 33*.

6. The method of manufacturing a multidirectional fiber reinforced laminate which is flexible and foldable and which contains at least four separate layers of reinforcing fibers disposed between a pair of plastic films, said laminate having a machine direction and a cross-direction, the fibers in each layer being substantially parallel with each other, which comprises the steps of:

supplying to a laminator two plastic fiber webs, and, between said webs, a first layer of substantially parallel fibers, and, a second layer of substantially parallel fibers, and, a third layer of substantially parallel fibers, and, a fourth layer of substantially parallel fibers, the fibers in the first layer being disposed at an angle to those in the second layer so that the fibers of the first and second layers form diamond patterns, each of the diamonds of said pattern having four edges, two opposite edges being defined by two fibers of said first layer and the other two opposite edges being defined by two fibers of said second layer, each of said diamonds having two acute angled corners and two obtuse angled corners defined by said edges and having a long axis extending between said acute angled corners and a short axis extending between said obtuse angled corners, the fibers in the third layer being disposed at an angle to those in the fourth layer so that the fibers of the third and fourth layers form diamond patterns, each of the diamonds of said pattern having four edges, two opposite edges being defined by two fibers of said third layer and the other two opposite edges being defined by two fibers of said fourth layer, each of said diamonds having two acute angled corners and two obtuse angled corners defined by said edges and having a long axis extending between said acute angled corners and a short axis extending between said obtuse corners, the long axes of the diamonds in the diamond pattern of the third and fourth layers extending substantially in the corss-direction, so that none of the fibers extend substantially in either the machine direction or the cross-direction, and laminating said webs and layers together.

7. The method of claim 6 wherein the acute angles of the diamonds in one of said diamond patterns are from 10* to 40*.

8. The method of claim 6 wherein the acute angles of the diamonds in both of said diamond patterns are from 10* to 40*.

9. The method of claim 6 wherein the acute angles of the diamonds in one of said diamond patterns are between 20* and 33*.

10. The method of claim 6 wherein the acute angles of the diamonds in both of said diamond patterns are between 20* and 33*.