Two-color molded product and method for manufacturing the same
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
- Filing Date
- 2024-11-28
- Publication Date
- 2026-06-09
AI Technical Summary
【0016】 以上のように、本開示に係る二色成形品によれば、一次成形樹脂又は二次成形樹脂とセルロース系繊維とを含むセルロース系複合材料の表面に露出するセルロース系繊維が、二色成形品の二次成形部又は一次成形部の相手樹脂層内に入り込む。これによって、一次成形部と二次成形部との界面の密着力が高まり、界面強度が高い二色成形品を得ることができる。
Smart Images
Figure 2026093841000001_ABST
Abstract
Claims
1. The primary molded part of the molded body of the primary molded resin, A secondary molding section of a molded body of secondary molding resin, provided in contact with the primary molding section, A two-color molded product having the following features: A two-color molded product in which at least one of the primary molded portion and the secondary molded portion contains cellulose fibers.
2. The two-color molded article according to claim 1, wherein the primary molded portion or the secondary molded portion containing the cellulose fibers has a concentration of 25 wt% or more of the cellulose fibers with respect to the weight of the primary molded portion or the secondary molded portion.
3. The two-color molded article according to claim 1, wherein both the primary molded portion and the secondary molded portion contain cellulose fibers.
4. The two-color molded article according to claim 3, wherein the primary molded portion and the secondary molded portion both have a concentration of cellulose fibers of 25 wt% or more in the entirety of the primary molded portion or the secondary molded portion.
5. The two-color molded product according to any one of claims 1 to 4, wherein a part of the surface shape of the secondary molded portion is surrounded by the primary molded portion.
6. A process of forming a primary molded part by molding a primary molding resin, A step of forming a secondary molded portion by molding a secondary molding resin so as to be in contact with the primary molded portion, A method for manufacturing a two-color molded product, including, A method for manufacturing a two-color molded product, comprising incorporating cellulose fibers in at least one of the primary molding resin or the secondary molding resin, thereby incorporating cellulose fibers in the primary molded portion or the secondary molded portion.
7. The method for producing a two-color molded article according to claim 6, wherein the concentration of the cellulose fibers is 25 wt% or more of the total weight of the primary molding resin or the secondary molding resin and the cellulose fibers.
8. A method for manufacturing a two-color molded product according to claim 6, wherein each of the primary molding resin and the secondary molding resin contains cellulose fibers, and the primary molded portion and the secondary molded portion contain cellulose fibers.
9. A method for producing a two-color molded article according to claim 8, wherein the concentration of the cellulose fibers relative to the total weight of the primary molding resin and the cellulose fibers, and the concentration of the cellulose fibers relative to the total weight of the secondary molding resin and the cellulose fibers, are each 25 wt% or more.
10. The process of forming the primary molded portion is as follows: The process of clamping the movable and fixed molds of the primary molding die, A step of injecting and filling a primary molding resin into a primary cavity defined between the movable mold and the fixed mold of the primary molding die, thereby forming a primary molded portion of the molded body of the primary molding resin, The process of opening the movable mold and the fixed mold of the primary molding die, Includes, The process of forming the secondary molded portion is as follows: A step of clamping the movable part of the secondary molding die on which the primary molding section is placed and the fixed mold, The process involves injecting and filling a secondary molding resin into the secondary cavity defined between the movable mold and the primary molding section of the secondary molding die and the fixed mold, thereby forming a secondary molding section of the molded body of the secondary molding resin that is in contact with the primary molding section. The process of opening the movable mold and the fixed mold of the secondary molding die, A method for manufacturing a two-color molded article according to claim 7 or 9, including the method described in claim 7 or 9.
11. In the process of forming the secondary molded portion, the fixed mold of the secondary molding die includes a bridge shape in the secondary cavity defined between it and the movable mold, which guides the secondary molded resin beyond the primary molded portion placed on the movable mold, and a portion of the surface shape of the secondary molded portion forms a portion surrounded by the primary molded portion. A method for manufacturing a two-color molded product according to claim 10.