CN106272749A - Lng船用胶合板的制备方法 - Google Patents

Lng船用胶合板的制备方法 Download PDF

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Publication number
CN106272749A
CN106272749A CN201610895157.4A CN201610895157A CN106272749A CN 106272749 A CN106272749 A CN 106272749A CN 201610895157 A CN201610895157 A CN 201610895157A CN 106272749 A CN106272749 A CN 106272749A
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veneer
slab
plywood
birch
preparation
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程大莉
张晓冬
张齐生
耿海平
沈立
李伟杰
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Nanjing Forestry University
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Nanjing Forestry University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27DWORKING VENEER OR PLYWOOD
    • B27D1/00Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B27D1/08Manufacture of shaped articles; Presses specially designed therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27DWORKING VENEER OR PLYWOOD
    • B27D1/00Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27KPROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02Processes; Apparatus
    • B27K3/15Impregnating involving polymerisation including use of polymer-containing impregnating agents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27KPROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/04Combined bleaching or impregnating and drying of wood

Abstract

本发明提供一种强度高、弹性模量大、尺寸稳定性好、胶合强度高的LNG船用胶合板的制备方法,其包括下述步骤:把以东北桦木制成的桦木单板在浸渍型酚醛树脂胶粘剂浸渍4‑6分钟,对浸渍后的单板干燥,使浸渍后的单板含水率达到9‑12%;浸渍型酚醛树脂胶粘剂的固含量35‑40%;由相同厚度的单板组坯而成板坯,板坯以中心层对称,相邻单板之间纤维方向垂直,中心层纤维方向平行于表层;在压力1.0‑1.2 MPa下对板坯热压,热压时间50‑60s/mm板坯厚度。

Description

LNG船用胶合板的制备方法
技术领域
本发明涉及一种LNG船用胶合板的制备方法。
背景技术
LNG船是运输液化天然气的主要运输工具,大致有球形和薄膜型两种。薄膜型LNG船的关键技术是货物围护系统,其是由两层绝缘层和两层殷瓦薄膜构成,其中的绝缘层主要由胶合板制成。由于运输货物的超低温(-163℃)特点,要求胶合板耐低温,具有良好的强度和胶合性能。
发明内容
本发明的目的是提供一种强度高、弹性模量大、尺寸稳定性好、胶合强度高的LNG船用胶合板的制备方法。
本发明所述的LNG船用胶合板的制备方法,它包括下述步骤:
a.单板浸渍:把以东北桦木制成的桦木单板在浸渍型酚醛树脂胶粘剂浸渍4-6分钟,对浸渍后的单板干燥,使浸渍后的单板含水率达到9-12%;浸渍型酚醛树脂胶粘剂的固含量35-40%;
b.单板组坯:由相同厚度的单板组坯而成板坯,板坯以中心层对称,相邻单板之间纤维方向垂直,中心层纤维方向平行于表层;
c.热压成型:在压力1.0-1.2 MPa下对板坯热压, 热压时间50-60s/mm板坯厚度。
上述的LNG船用胶合板的制备方法,东北桦木为产自黑龙江的枫桦。
上述的LNG船用胶合板的制备方法,东北桦木为产自黑龙江的白桦。
上述的LNG船用胶合板的制备方法,对浸渍后的单板在50-60℃下干燥。
上述的LNG船用胶合板的制备方法,组成板坯的单板层数为不少于5层的单数层,各单板层的厚度为1-3mm。
本发明的有益效果:
由于东北桦木木材生长在东北高纬度地区,生长较慢,材质较紧密,具有较其他树种优良的耐寒性能。以该种木材的单板制成的胶合板,具有较好的耐低温性能,适于LNG船用。利用酚醛树脂浸渍液浸渍单板,可以实现树脂部分渗透木材内部,部分留在木材表面作为胶粘剂,无需对浸渍单板的二次涂胶,同时酚醛树脂硬度高、耐水性好,所以浸渍单板可以显著增强板材抗弯性能, 提高表面耐磨性能和尺寸稳定性。浸渍型酚醛树脂胶粘剂的固含量35-40%,固含量过高,树脂难于浸入单板内部;固含量过低,附着在单板表面的树脂较少,还需要二次涂胶。对浸渍后的单板适宜50-60℃下干燥,这样可以缩短干燥时间,同时也不会树脂的性能造成影响。各单板层的厚度为1-3mm,浸渍型酚醛树脂胶粘剂能够在4-6分钟内基本浸透。
附图说明
图1是胶合板组坯示意图。
具体实施方式
以下结合实施例对本发明作进一步具体描述,但不局限于此。
实施例1: LNG船用枫桦胶合板
对产自黑龙江省大兴安岭的枫桦去皮截断后进行旋切,制成厚度为1.6mm的单板,把单板在固含量35-40%的浸渍型酚醛树脂胶粘剂浸渍4-5分钟,对浸渍后的单板在50-55℃下干燥,使浸渍后的单板含水率达到9-12%;把9层单板组坯而成板坯,板坯以中心层对称,相邻单板之间纤维方向垂直,中心层纤维方向平行于上表层和下表层。在压力1.0-1.2 MPa下对板坯热压, 热压时间50-55s/mm板坯厚度。热压成型后冷却得到LNG船用枫桦胶合板。
实施例2:LNG船用白桦胶合板
对产自黑龙江省大兴安岭的白桦去皮截断后进行旋切,制成厚度为2.4mm的单板,把单板在固含量35-40%的浸渍型酚醛树脂胶粘剂浸渍5-6分钟,对浸渍后的单板在55-60℃下干燥,使浸渍后的单板含水率达到9-12%;参见图1,把13层单板1-13组坯而成板坯,板坯以中心层7对称,相邻单板之间纤维方向垂直,中心层7纤维方向平行于上表层1、上表层13。在压力1.0-1.2 MPa下对板坯热压, 热压时间55-60s/mm板坯厚度。热压成型后冷却得到LNG船用白桦胶合板。
从实施例1、2制备的LNG船用枫桦胶合板、白桦胶合板上各制取40个试样。把枫桦胶合板试样、白桦胶合板试样各10个浸入液化天然气中48h,然后取出,待试样恢复到室温后,对这些试样按照欧洲标准EN310进行抗弯弹性模量和静曲强度测试。把枫桦胶合板试样、白桦胶合板试样各10个放入沸水中煮4个小时;然后在温度为60±3℃烘箱内干燥20个小时,再放入沸水煮4个小时;用水冷却至室温,对试样根据欧洲标准EN314-1进行胶合强度测试,结果见表1中的测试组。
把枫桦胶合板试样、白桦胶合板试样各10个直接按照欧洲标准EN310进行抗弯弹性模量和静曲强度测试;把枫桦胶合板试样、白桦胶合板试样各10个直接根据欧洲标准EN314-1进行胶合强度测试,结果见表1中的对照组。
表1

Claims (5)

1.LNG船用胶合板的制备方法,其特征是:它包括下述步骤:
a.单板浸渍:把以东北桦木制成的桦木单板在浸渍型酚醛树脂胶粘剂浸渍4-6分钟,对浸渍后的单板干燥,使浸渍后的单板含水率达到9-12%;浸渍型酚醛树脂胶粘剂的固含量35-40%;
b.单板组坯:由相同厚度的单板组坯而成板坯,板坯以中心层对称,相邻单板之间纤维方向垂直,中心层纤维方向平行于表层;
c.热压成型:在压力1.0-1.2 MPa下对板坯热压, 热压时间50-60s/mm板坯厚度。
2.如权利要求1所述的LNG船用胶合板的制备方法,其特征是:东北桦木为产自黑龙江的枫桦。
3.如权利要求1所述的LNG船用胶合板的制备方法,其特征是:东北桦木为产自黑龙江的白桦。
4.如权利要求1所述的LNG船用胶合板的制备方法,其特征是:对浸渍后的单板在50-60℃下干燥。
5.如权利要求1所述的LNG船用胶合板的制备方法,其特征是:组成板坯的单板层数为不少于5层的单数层,各单板层的厚度为1-3mm。
CN201610895157.4A 2016-10-14 2016-10-14 Lng船用胶合板的制备方法 Pending CN106272749A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107457168A (zh) * 2017-08-23 2017-12-12 阜南县润杨家居有限公司 一种木板喷漆方法
CN109648673A (zh) * 2017-10-10 2019-04-19 克尼普罗国际 制造压缩多色胶合板及其实用品、装饰品以及装饰性产品的工艺

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107457168A (zh) * 2017-08-23 2017-12-12 阜南县润杨家居有限公司 一种木板喷漆方法
CN109648673A (zh) * 2017-10-10 2019-04-19 克尼普罗国际 制造压缩多色胶合板及其实用品、装饰品以及装饰性产品的工艺

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